title
Exception Handling In Java | Exception Handling In Java With Examples | Java Tutorial | Edureka
description
π₯ Java Certification Training (Use Code "πππππππππ"): https://www.edureka.co/java-j2ee-training-course
This Edureka tutorial on βJava Exception Handlingβ will give you a brief insight into Exceptions in Java and its various methods to handle the Exceptions along with examples. Through this video, you will learn the following topics:
What is Exception Handling - 1:30
Error vs Exceptions - 2:22
Exception Hierarchy- 3:03
Checked and Unchecked Exceptions - 4:18
Basic Example Format of Exception - 4:52
Types of Java Exceptions - 7:25
Built in Exceptions - 7:36
Exception Handling Methods - 10:05
throw vs throws - 17:23
final vs finally vs finalize - 18:02
User Defined Exception - 18:44
Custom Exceptions - 20:31
Parsing an Exception - 21:52
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Why learn Java?
Java is a general-purpose, class-based, object-oriented computer programming language that was designed by James Gosling at Sun Microsystems in 1995.
Key Highlights of Java:
Platform Independent: This allows programmers to develop applications that can run on any operating system.
Usability of Java: Java is most widely used programming language. It is present everywhere. It really doesn't matter which domain you are working in, you will surely come across Java sooner or later!
Open Source: The good news is that Java is available for free! All the development tools and the environment (JRE & JDK) that is used to develop Java applications are absolutely free of cost.
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detail
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these fundamentals.', 'start': 60.433, 'duration': 1.68}, {'end': 67.294, 'text': "Let's hook into the programming part and learn the basic syntax of exception handling.", 'start': 62.553, 'duration': 4.741}, {'end': 73.855, 'text': 'once we are done with the basic syntax, then I will be explaining you the types of exceptions in depth after that.', 'start': 67.294, 'duration': 6.561}, {'end': 78.596, 'text': 'We will dive into the various methods of exception handling, along with the examples,', 'start': 73.935, 'duration': 4.661}, {'end': 86.137, 'text': 'and I will wrap up the session by giving you a difference between throw and throws and also between final finalize and finally also,', 'start': 78.596, 'duration': 7.541}, {'end': 89.718, 'text': 'we will be seeing about custom exceptions and how to pass an exception.', 'start': 86.137, 'duration': 3.581}], 'summary': 'Overview of exceptions hierarchy, checked and unchecked exceptions, basic syntax, types of exceptions, methods of exception handling, and differentiation between throw and throws, final finalize and finally, and custom exceptions.', 'duration': 36.959, 'max_score': 52.759, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X452759.jpg'}, {'end': 157.422, 'src': 'embed', 'start': 107.66, 'weight': 0, 'content': [{'end': 116.825, 'text': 'or you can also say that a network connection that has been lost in the middle of communications or the JVM has run out of memory many such cases.', 'start': 107.66, 'duration': 9.165}, {'end': 121.072, 'text': 'but if we do not handle them it leads to a system failure.', 'start': 117.469, 'duration': 3.603}, {'end': 124.755, 'text': 'So handling an exception is very important,', 'start': 121.753, 'duration': 3.002}, {'end': 134.083, 'text': "and that's where Java introduced exception handling mechanism to handle the runtime errors so that the normal execution flow will not be disrupted.", 'start': 124.755, 'duration': 9.328}, {'end': 139.527, 'text': 'For example class not found IO exception SQL exception, etc.', 'start': 134.583, 'duration': 4.944}, {'end': 143.671, 'text': "Now, let's move ahead and see the difference between error and exception.", 'start': 140.108, 'duration': 3.563}, {'end': 150.695, 'text': 'First, errors are impossible to recover, but exception can be recovered by handling them.', 'start': 144.409, 'duration': 6.286}, {'end': 157.422, 'text': 'next, errors are of type unchecked, but exceptions can be either checked or unchecked type.', 'start': 150.695, 'duration': 6.727}], 'summary': 'Java introduced exception handling to prevent system failure due to runtime errors such as network connection loss or jvm running out of memory. errors are unrecoverable, while exceptions can be handled and are either checked or unchecked.', 'duration': 49.762, 'max_score': 107.66, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4107660.jpg'}, {'end': 203.412, 'src': 'heatmap', 'start': 172.207, 'weight': 3, 'content': [{'end': 176.648, 'text': 'Whereas errors are caused by the environment on which the application is running.', 'start': 172.207, 'duration': 4.441}, {'end': 180.89, 'text': 'So these are the key points of difference between errors and exceptions.', 'start': 177.189, 'duration': 3.701}, {'end': 182.891, 'text': "Now, let's see.", 'start': 181.97, 'duration': 0.921}, {'end': 191.074, 'text': 'What is exception hierarchy all exceptions and errors types are subclasses of class throwable, which is the base class of hierarchy.', 'start': 182.951, 'duration': 8.123}, {'end': 194.006, 'text': 'Here one branch is heated by exception.', 'start': 191.724, 'duration': 2.282}, {'end': 203.412, 'text': 'That is, this class is used for exceptional conditions that user program should catch, for example, say null pointer exception, runtime exception,', 'start': 194.526, 'duration': 8.886}], 'summary': 'Errors and exceptions are subclasses of throwable, used for exceptional conditions in user programs.', 'duration': 31.205, 'max_score': 172.207, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4172207.jpg'}], 'start': 11.172, 'title': 'Java exception handling', 'summary': 'Covers the fundamentals and methods of java exception handling, including an overview of exceptions, their hierarchy, types, and comparison between errors and exceptions, enabling the program to be more robust and easier to debug. it also discusses the importance of exception handling in java, including the types of exceptions, the difference between errors and exceptions, and the exception hierarchy with all exceptions and errors types being subclasses of class throwable.', 'chapters': [{'end': 89.718, 'start': 11.172, 'title': 'Java exception handling', 'summary': 'Covers the fundamentals and methods of java exception handling, including an overview of exceptions, their hierarchy, types, and comparison between errors and exceptions, enabling the program to be more robust and easier to debug.', 'duration': 78.546, 'highlights': ['Java exception handling provides a powerful mechanism to handle errors and exceptions, making the program more robust and easier to debug. Effective exception handling in Java improves program robustness and ease of debugging.', 'The chapter includes an overview of exceptions hierarchy, comparison between checked and unchecked exceptions, and the basic syntax of exception handling. The chapter provides an overview of exceptions hierarchy, checked and unchecked exceptions, and basic syntax of exception handling.', 'The session also covers various methods of exception handling with examples, along with explanations on throw and throws, final, finalize, and finally, and custom exceptions. The session delves into various methods of exception handling, including throw and throws, final, finalize, and finally, and custom exceptions.']}, {'end': 194.006, 'start': 90.672, 'title': 'Java exception handling', 'summary': 'Discusses the importance of exception handling in java, including the types of exceptions, the difference between errors and exceptions, and the exception hierarchy with all exceptions and errors types are subclasses of class throwable.', 'duration': 103.334, 'highlights': ['The chapter discusses the importance of exception handling in Java, including the types of exceptions, the difference between errors and exceptions, and the exception hierarchy with all exceptions and errors types are subclasses of class throwable.', 'Exception handling is vital as it prevents system failures, and Java introduced exception handling mechanism to handle runtime errors, such as class not found, IO exception, SQL exception, etc.', 'Errors are impossible to recover, while exceptions can be recovered by handling them, and they can be either checked or unchecked type, and they can happen either at compile time or runtime.']}], 'duration': 182.834, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X411172.jpg', 'highlights': ['Java exception handling provides a powerful mechanism to handle errors and exceptions, making the program more robust and easier to debug.', 'The chapter includes an overview of exceptions hierarchy, comparison between checked and unchecked exceptions, and the basic syntax of exception handling.', 'The session delves into various methods of exception handling, including throw and throws, final, finalize, and finally, and custom exceptions.', 'The chapter discusses the importance of exception handling in Java, including the types of exceptions, the difference between errors and exceptions, and the exception hierarchy with all exceptions and errors types are subclasses of class throwable.', 'Exception handling is vital as it prevents system failures, and Java introduced exception handling mechanism to handle runtime errors, such as class not found, IO exception, SQL exception, etc.', 'Errors are impossible to recover, while exceptions can be recovered by handling them, and they can be either checked or unchecked type, and they can happen either at compile time or runtime.']}, {'end': 333.886, 'segs': [{'end': 249.668, 'src': 'embed', 'start': 219.494, 'weight': 0, 'content': [{'end': 222.817, 'text': 'So how Java virtual machine handles exceptions?', 'start': 219.494, 'duration': 3.323}, {'end': 226.501, 'text': 'whenever inside a method, if an exception has occurred,', 'start': 222.817, 'duration': 3.684}, {'end': 232.967, 'text': 'then the method creates an object known as exception object and hands it off to the runtime system,', 'start': 226.501, 'duration': 6.466}, {'end': 240.714, 'text': 'and this exception object contains name and description of the exception and also the current state of the program where exception has occurred.', 'start': 232.967, 'duration': 7.747}, {'end': 249.668, 'text': 'and creating the exception object and handling it to the runtime system is called throwing an exception, then using try catch finally methods.', 'start': 241.3, 'duration': 8.368}], 'summary': 'Java virtual machine creates exception object when an exception occurs, containing name, description, and program state. exception handling involves try-catch-finally methods.', 'duration': 30.174, 'max_score': 219.494, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4219494.jpg'}, {'end': 303.994, 'src': 'embed', 'start': 263.012, 'weight': 1, 'content': [{'end': 271.674, 'text': 'Exceptions that happen at compile time are checked exceptions like IO exceptions, Etc and runtime exceptions are called unchecked exceptions,', 'start': 263.012, 'duration': 8.662}, {'end': 276.055, 'text': 'like divide by 0, array out of bound, null pointer exception, Etc.', 'start': 271.674, 'duration': 4.381}, {'end': 280.816, 'text': 'Basically unchecked exceptions are built-in exceptions in Java.', 'start': 276.575, 'duration': 4.241}, {'end': 281.916, 'text': 'So check.', 'start': 281.316, 'duration': 0.6}, {'end': 284.497, 'text': 'the exceptions cannot be simply ignored.', 'start': 281.916, 'duration': 2.581}, {'end': 290.358, 'text': 'the programmer should handle these exceptions and runtime exceptions are ignored at the time of compilation.', 'start': 284.497, 'duration': 5.861}, {'end': 294.146, 'text': "Now, let's see the basic example of exception.", 'start': 291.204, 'duration': 2.942}, {'end': 298.27, 'text': 'So here I have defined the class and inside the main method.', 'start': 294.827, 'duration': 3.443}, {'end': 299.391, 'text': 'I have a try block.', 'start': 298.37, 'duration': 1.021}, {'end': 303.994, 'text': 'So in this try block the code that we are going to write me raise exception.', 'start': 299.971, 'duration': 4.023}], 'summary': 'Java has checked and unchecked exceptions. checked exceptions are handled by the programmer, while runtime exceptions are ignored at compilation.', 'duration': 40.982, 'max_score': 263.012, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4263012.jpg'}], 'start': 194.526, 'title': 'Java exception handling', 'summary': "Covers java virtual machine's internal exception handling, differences between checked and unchecked exceptions, and emphasizes the importance of handling exceptions, with a basic example.", 'chapters': [{'end': 333.886, 'start': 194.526, 'title': 'Java exception handling', 'summary': 'Covers how java virtual machine handles exceptions internally, the differences between checked and unchecked exceptions, and provides a basic example of exception handling, emphasizing the importance of handling exceptions and the distinction between checked and unchecked exceptions.', 'duration': 139.36, 'highlights': ['Java virtual machine creates an exception object containing the name, description, and current program state when an exception occurs, and handles it to the runtime system, known as throwing an exception. Inside a method, when an exception occurs, an exception object is created containing the name, description, and current state of the program, and handed off to the runtime system, which is called throwing an exception.', 'Distinguishing between checked and unchecked exceptions, where checked exceptions occur at compile time and must be handled, while runtime exceptions are ignored at compilation. Checked exceptions occur at compile time and must be handled, while runtime exceptions are ignored at the time of compilation.', 'Importance of handling exceptions, with the example showcasing the use of try and catch blocks to raise and handle exceptions. The provided example demonstrates the use of try and catch blocks to raise and handle exceptions, emphasizing the importance of handling exceptions.']}], 'duration': 139.36, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4194526.jpg', 'highlights': ['Java virtual machine creates an exception object containing the name, description, and current program state when an exception occurs, and handles it to the runtime system, known as throwing an exception.', 'Distinguishing between checked and unchecked exceptions, where checked exceptions occur at compile time and must be handled, while runtime exceptions are ignored at compilation.', 'Importance of handling exceptions, with the example showcasing the use of try and catch blocks to raise and handle exceptions.']}, {'end': 521.193, 'segs': [{'end': 363.033, 'src': 'embed', 'start': 336.527, 'weight': 3, 'content': [{'end': 340.609, 'text': 'So here I will create a string STR and make it as null.', 'start': 336.527, 'duration': 4.082}, {'end': 345.271, 'text': 'So now after this I will try to retrieve the length of the string.', 'start': 341.509, 'duration': 3.762}, {'end': 355.37, 'text': 'So when I execute this program it will throw an exception Why because the string is null and we are trying to retrieve the length of the string.', 'start': 347.872, 'duration': 7.498}, {'end': 361.052, 'text': 'As I said it throws null pointer exception because the string is null.', 'start': 356.69, 'duration': 4.362}, {'end': 363.033, 'text': 'It does not contain any values.', 'start': 361.493, 'duration': 1.54}], 'summary': 'Creating a null string and attempting to retrieve its length throws a null pointer exception.', 'duration': 26.506, 'max_score': 336.527, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4336527.jpg'}, {'end': 494.226, 'src': 'embed', 'start': 425.674, 'weight': 0, 'content': [{'end': 429.257, 'text': 'So as I told the exception has been catched by catch block.', 'start': 425.674, 'duration': 3.583}, {'end': 434.624, 'text': 'So here first it will throw the exception and then it goes to the catch block.', 'start': 429.961, 'duration': 4.663}, {'end': 441.108, 'text': 'catch block handles, arithmetic exception e, so it prints cannot divide a number by 0..', 'start': 434.624, 'duration': 6.484}, {'end': 443.249, 'text': 'So this is how exception handling works.', 'start': 441.108, 'duration': 2.141}, {'end': 446.391, 'text': "Now, let's see the various types of exceptions.", 'start': 443.83, 'duration': 2.561}, {'end': 455.337, 'text': 'So in Java, there are two types of exceptions one built-in exceptions and the other one user defined exceptions first.', 'start': 447.532, 'duration': 7.805}, {'end': 457.058, 'text': "Let's see what is built-in exceptions.", 'start': 455.417, 'duration': 1.641}, {'end': 467.229, 'text': 'These are the exceptions which are available in Java libraries and they are suitable to explain certain error situations like arithmetic exception array index.', 'start': 457.839, 'duration': 9.39}, {'end': 469.431, 'text': 'out-of-bound exception class not found.', 'start': 467.229, 'duration': 2.202}, {'end': 471.153, 'text': 'IO exception runtime.', 'start': 469.431, 'duration': 1.722}, {'end': 472.895, 'text': 'exception number format, Etc.', 'start': 471.153, 'duration': 1.742}, {'end': 476.779, 'text': "So let's see an example and understand how built-in exception works.", 'start': 473.655, 'duration': 3.124}, {'end': 483.498, 'text': 'So this example is one type of exception that is arithmetic exception,', 'start': 478.895, 'duration': 4.603}, {'end': 488.962, 'text': 'where we try to divide the number by 0 and it results in arithmetic exception and we have catch the method.', 'start': 483.498, 'duration': 5.464}, {'end': 491.584, 'text': "So let's see one more example of that kind now.", 'start': 489.703, 'duration': 1.881}, {'end': 494.226, 'text': "I'll use one more try block.", 'start': 492.925, 'duration': 1.301}], 'summary': 'Java exception handling: catching arithmetic exception, built-in exception types explained.', 'duration': 68.552, 'max_score': 425.674, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4425674.jpg'}], 'start': 336.527, 'title': 'Java exception handling', 'summary': 'Discusses exception handling in java, covering scenarios such as retrieving length of a null string, handling arithmetic exceptions by using try and catch blocks, understanding how exception handling works, and emphasizes the importance of catching exceptions to maintain the normal flow.', 'chapters': [{'end': 446.391, 'start': 336.527, 'title': 'Exception handling in java', 'summary': 'Discusses exception handling in java, covering scenarios such as retrieving length of a null string, handling arithmetic exceptions by using try and catch blocks, and understanding how exception handling works.', 'duration': 109.864, 'highlights': ['The chapter demonstrates the concept of retrieving the length of a null string, which throws a null pointer exception, illustrating the need for exception handling in such scenarios.', 'It explains the use of try and catch blocks to handle arithmetic exceptions, with a specific example of dividing a number by 0, resulting in an arithmetic exception being caught and handled by the catch block.', 'It discusses the functionality of catch blocks in maintaining the normal flow of execution by handling exceptions, as demonstrated in the scenario of catching an arithmetic exception and printing a custom message.', 'The chapter concludes with an overview of various types of exceptions, providing a comprehensive understanding of exception handling in Java.']}, {'end': 521.193, 'start': 447.532, 'title': 'Java exceptions', 'summary': 'Discusses built-in exceptions in java, including examples of arithmetic exception and handling exception when passing a string variable as an integer, emphasizing the importance of catching exceptions to maintain the normal flow.', 'duration': 73.661, 'highlights': ['The chapter discusses built-in exceptions in Java, including examples of arithmetic exception and handling exception when passing a string variable as an integer, emphasizing the importance of catching exceptions to maintain the normal flow.', 'Built-in exceptions in Java libraries are suitable to explain certain error situations like arithmetic exception, array index out-of-bound exception, class not found, IO exception, runtime exception, number format, etc.', 'The example of arithmetic exception demonstrates the result when dividing a number by 0, resulting in an arithmetic exception and the need to catch the method.', 'The demonstration of passing a string variable as an integer and the resulting exception highlights the importance of handling exceptions to maintain the normal flow.']}], 'duration': 184.666, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4336527.jpg', 'highlights': ['The chapter concludes with an overview of various types of exceptions, providing a comprehensive understanding of exception handling in Java.', 'Built-in exceptions in Java libraries are suitable to explain certain error situations like arithmetic exception, array index out-of-bound exception, class not found, IO exception, runtime exception, number format, etc.', 'It discusses the functionality of catch blocks in maintaining the normal flow of execution by handling exceptions, as demonstrated in the scenario of catching an arithmetic exception and printing a custom message.', 'The chapter demonstrates the concept of retrieving the length of a null string, which throws a null pointer exception, illustrating the need for exception handling in such scenarios.', 'The chapter discusses built-in exceptions in Java, including examples of arithmetic exception and handling exception when passing a string variable as an integer, emphasizing the importance of catching exceptions to maintain the normal flow.']}, {'end': 747.934, 'segs': [{'end': 657.782, 'src': 'embed', 'start': 551.452, 'weight': 0, 'content': [{'end': 559.917, 'text': "So here you can see I have created an area of size 5 and now I'll try to access the seventh element in the array.", 'start': 551.452, 'duration': 8.465}, {'end': 562.263, 'text': 'So what happens after this?', 'start': 560.501, 'duration': 1.762}, {'end': 569.489, 'text': "it will obviously throw an exception by, because the size of the array is 5 and I'm trying to access the array that is out of bound.", 'start': 562.263, 'duration': 7.226}, {'end': 574.414, 'text': 'So what happens when I catch the exception? It says array index out of one exception.', 'start': 570.03, 'duration': 4.384}, {'end': 586.065, 'text': 'Sorry, it is array index out of bounds.', 'start': 584.163, 'duration': 1.902}, {'end': 590.289, 'text': "Now again, let's execute.", 'start': 589.028, 'duration': 1.261}, {'end': 597.293, 'text': 'As I said again the array index out-of-bounds exception got handled and it printed the output.', 'start': 592.41, 'duration': 4.883}, {'end': 601.455, 'text': 'So this is how built-in exceptions are present in Java libraries.', 'start': 598.013, 'duration': 3.442}, {'end': 611.32, 'text': 'So now I will jump into that methods of exceptions, because you need to know the throw and throws methods to understand user defined exceptions.', 'start': 602.515, 'duration': 8.805}, {'end': 613.381, 'text': 'after I complete the methods of exceptions.', 'start': 611.32, 'duration': 2.061}, {'end': 615.963, 'text': 'I will explain you the user defined exceptions.', 'start': 613.782, 'duration': 2.181}, {'end': 623.106, 'text': 'So these are the various methods of exceptions, that is, try, catch, finally throw and throws.', 'start': 616.861, 'duration': 6.245}, {'end': 624.987, 'text': "let's see each of them.", 'start': 623.106, 'duration': 1.881}, {'end': 630.231, 'text': 'first, try, try block is used to enclose the code that may throw exception.', 'start': 624.987, 'duration': 5.244}, {'end': 633.094, 'text': 'the syntax is as follows, as you have already seen.', 'start': 630.231, 'duration': 2.863}, {'end': 634.375, 'text': "It's very simple.", 'start': 633.574, 'duration': 0.801}, {'end': 640.88, 'text': 'We write a code that throws exception and we can handle it using the catch block next nested try.', 'start': 634.695, 'duration': 6.185}, {'end': 643.882, 'text': 'nested try block is nothing but a try within a try block.', 'start': 640.88, 'duration': 3.002}, {'end': 646.598, 'text': 'For example, you can see here.', 'start': 644.457, 'duration': 2.141}, {'end': 652.4, 'text': 'I have declared one try and inside that I have created one more try catch and there is one more try as well.', 'start': 646.618, 'duration': 5.782}, {'end': 655.521, 'text': "So let's see a small example as how it works.", 'start': 652.86, 'duration': 2.661}, {'end': 657.782, 'text': "So I'll do one thing here.", 'start': 656.722, 'duration': 1.06}], 'summary': 'Demonstration of handling array index out-of-bounds exception and explanation of try-catch blocks and nested try in java.', 'duration': 106.33, 'max_score': 551.452, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4551452.jpg'}, {'end': 747.934, 'src': 'embed', 'start': 694.304, 'weight': 1, 'content': [{'end': 700.827, 'text': "Okay, and now I have created one more try catch and handle here after that what I'm doing.", 'start': 694.304, 'duration': 6.523}, {'end': 704.689, 'text': "I'm just giving a statement as print other statement after that.", 'start': 700.847, 'duration': 3.842}, {'end': 706.651, 'text': "I'm closing this try block.", 'start': 705.11, 'duration': 1.541}, {'end': 710.773, 'text': "Then I'm again catching the exception and handling that.", 'start': 707.871, 'duration': 2.902}, {'end': 716.685, 'text': 'Okay, so within this one try block there are two try blocks.', 'start': 711.463, 'duration': 5.222}, {'end': 719.826, 'text': "So that's how nested try can be used.", 'start': 717.865, 'duration': 1.961}, {'end': 723.067, 'text': "So let's see the output see first.", 'start': 720.146, 'duration': 2.921}, {'end': 728.989, 'text': "It's saying that cannot divide by 0 because it was the first thing that we have done and within the try block.", 'start': 723.207, 'duration': 5.782}, {'end': 737.572, 'text': 'It said number format, exception because the first try block got executed and next for this one more exception that it showed.', 'start': 729.069, 'duration': 8.503}, {'end': 741.191, 'text': 'it said it handled and again is printed other statement.', 'start': 737.572, 'duration': 3.619}, {'end': 747.934, 'text': "That's all because we are not declaring anything in the other try block that is the main try block.", 'start': 741.971, 'duration': 5.963}], 'summary': 'Demonstration of nested try blocks, handling exceptions, and print statements.', 'duration': 53.63, 'max_score': 694.304, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4694304.jpg'}], 'start': 521.214, 'title': 'Exception handling in java', 'summary': "Discusses handling built-in exceptions like arithmetic, number format, and array index out-of-bounds exceptions in java, including the process of catching and handling these exceptions to prevent program crashes. it also covers various methods of exceptions including try, catch, finally, throw, and throws, along with an example of nested try blocks. additionally, it explains the usage of nested try blocks in java, demonstrating how to handle exceptions within nested try blocks, resulting in the output 'cannot divide by 0' and 'number format exception' being handled and 'other statement' being printed.", 'chapters': [{'end': 611.32, 'start': 521.214, 'title': 'Handling exceptions in java', 'summary': 'Discusses handling built-in exceptions like arithmetic, number format, and array index out-of-bounds exceptions in java, including the process of catching and handling these exceptions to prevent program crashes.', 'duration': 90.106, 'highlights': ['The chapter explains the process of handling built-in exceptions like arithmetic, number format, and array index out-of-bounds exceptions in Java.', 'It mentions that when trying to access the seventh element in an array of size 5, an array index out-of-bounds exception occurs, providing a specific example of exception handling.', 'It highlights the importance of understanding the throw and throws methods for handling user-defined exceptions in Java.']}, {'end': 657.782, 'start': 611.32, 'title': 'Methods of exceptions', 'summary': 'Covers the various methods of exceptions including try, catch, finally, throw, and throws, along with an example of nested try blocks.', 'duration': 46.462, 'highlights': ['The chapter explains the various methods of exceptions, including try, catch, finally, throw, and throws.', 'It also includes an example of nested try blocks within a try block.', 'The try block is used to enclose the code that may throw an exception.', 'The nested try block is a try within a try block, demonstrated with a small example.']}, {'end': 747.934, 'start': 658.203, 'title': 'Nested try blocks example', 'summary': "Explains the usage of nested try blocks in java, demonstrating how to handle exceptions within nested try blocks, resulting in the output 'cannot divide by 0' and 'number format exception' being handled and 'other statement' being printed.", 'duration': 89.731, 'highlights': ["The program demonstrates nested try blocks in Java, with the first try block resulting in a 'cannot divide by 0' exception and the nested try block resulting in a 'number format exception' being handled.", "The output of the program shows the handling of exceptions within nested try blocks, with the final statement 'other statement' being printed after the exceptions are handled.", 'The example emphasizes the usage of nested try blocks for handling multiple exceptions within a Java program.']}], 'duration': 226.72, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4521214.jpg', 'highlights': ['The chapter explains the process of handling built-in exceptions like arithmetic, number format, and array index out-of-bounds exceptions in Java.', "The program demonstrates nested try blocks in Java, with the first try block resulting in a 'cannot divide by 0' exception and the nested try block resulting in a 'number format exception' being handled.", 'It mentions that when trying to access the seventh element in an array of size 5, an array index out-of-bounds exception occurs, providing a specific example of exception handling.', 'The example emphasizes the usage of nested try blocks for handling multiple exceptions within a Java program.', 'It highlights the importance of understanding the throw and throws methods for handling user-defined exceptions in Java.', "The output of the program shows the handling of exceptions within nested try blocks, with the final statement 'other statement' being printed after the exceptions are handled.", 'The chapter explains the various methods of exceptions, including try, catch, finally, throw, and throws.', 'It also includes an example of nested try blocks within a try block.', 'The try block is used to enclose the code that may throw an exception.', 'The nested try block is a try within a try block, demonstrated with a small example.']}, {'end': 1112.391, 'segs': [{'end': 794.747, 'src': 'embed', 'start': 770.929, 'weight': 1, 'content': [{'end': 779.015, 'text': "and there's also one more thing that is multi catch, that is, if you have to perform various tasks at the occurrence of various exceptions,", 'start': 770.929, 'duration': 8.086}, {'end': 781.057, 'text': 'then you can use Java multi catch block.', 'start': 779.015, 'duration': 2.042}, {'end': 785.16, 'text': 'So here you can see you have one try block and have multiple catch blocks.', 'start': 781.497, 'duration': 3.663}, {'end': 787.081, 'text': "So let's see how that works.", 'start': 785.72, 'duration': 1.361}, {'end': 790.544, 'text': 'And modify this program only for you.', 'start': 788.702, 'duration': 1.842}, {'end': 794.747, 'text': 'So here I have one try block and I have two different catch blocks.', 'start': 791.264, 'duration': 3.483}], 'summary': 'Java multi-catch block handles various exceptions in one try block.', 'duration': 23.818, 'max_score': 770.929, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4770929.jpg'}, {'end': 844.793, 'src': 'embed', 'start': 819.349, 'weight': 0, 'content': [{'end': 827.555, 'text': "Next we'll see finally finally is a block that is used to execute important codes such as closing connection stream Etc.", 'start': 819.349, 'duration': 8.206}, {'end': 833.626, 'text': 'No matter whether exception is handled or not finally block will always be executed.', 'start': 828.502, 'duration': 5.124}, {'end': 841.151, 'text': 'So in the previous example you saw that after declaring a try block, you must use catch block to maintain the normal flow.', 'start': 834.146, 'duration': 7.005}, {'end': 844.793, 'text': 'but on using finally block, the catch block is not required.', 'start': 841.151, 'duration': 3.642}], 'summary': 'Finally block always executes, even without catch block.', 'duration': 25.444, 'max_score': 819.349, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4819349.jpg'}, {'end': 965.474, 'src': 'heatmap', 'start': 924.299, 'weight': 0.788, 'content': [{'end': 931.043, 'text': "So first I throw the exception in try block and catch it and now I'm calling the entire function in the main method.", 'start': 924.299, 'duration': 6.744}, {'end': 933.164, 'text': "So let's see what will be the output.", 'start': 931.563, 'duration': 1.601}, {'end': 936.706, 'text': "It's just selling the exception is being caught.", 'start': 934.365, 'duration': 2.341}, {'end': 946.022, 'text': 'Correct Why because when we call the average function in the main method it goes back to the loop exception will be thrown but it has been catched.', 'start': 937.236, 'duration': 8.786}, {'end': 952.906, 'text': 'Correct So this is how throw is used to throw an exception and it can be handled in the catch block simple.', 'start': 946.622, 'duration': 6.284}, {'end': 953.827, 'text': "Let's see.", 'start': 953.486, 'duration': 0.341}, {'end': 958.87, 'text': 'What is throws throws is also a keyword which is used to declare the exceptions.', 'start': 953.867, 'duration': 5.003}, {'end': 965.474, 'text': 'It does not throw any exception but it specifies that there may occur any exception in the method.', 'start': 959.49, 'duration': 5.984}], 'summary': "Using throw to catch and handle exceptions, and understanding the 'throws' keyword for exception declaration.", 'duration': 41.175, 'max_score': 924.299, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4924299.jpg'}, {'end': 1078.502, 'src': 'embed', 'start': 1048.886, 'weight': 2, 'content': [{'end': 1050.968, 'text': 'but throws is used to declare an exception.', 'start': 1048.886, 'duration': 2.082}, {'end': 1053.891, 'text': 'We have already seen how it worked.', 'start': 1051.448, 'duration': 2.443}, {'end': 1062.178, 'text': 'next, check the exceptions cannot be propagated using only throw, but check the exceptions can be propagated using throws.', 'start': 1053.891, 'duration': 8.287}, {'end': 1068.604, 'text': 'throw is followed by an instance and throws is followed by a class, and throw is always used within a method,', 'start': 1062.178, 'duration': 6.426}, {'end': 1075.13, 'text': 'and throws is used with the method signature and throw can throw only one exception and not multiple exceptions,', 'start': 1068.604, 'duration': 6.526}, {'end': 1078.502, 'text': 'and trolls can declare multiple exceptions.', 'start': 1075.74, 'duration': 2.762}], 'summary': 'Throw and throws have different uses and limitations within java, including the ability to propagate exceptions and the number of exceptions they can handle.', 'duration': 29.616, 'max_score': 1048.886, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X41048886.jpg'}, {'end': 1117.612, 'src': 'embed', 'start': 1091.315, 'weight': 3, 'content': [{'end': 1095.798, 'text': 'final is used to apply restrictions on class methods and variables,', 'start': 1091.315, 'duration': 4.483}, {'end': 1104.625, 'text': 'but finally is used to place an important code and finalize is used to perform cleanup processing just before the object is garbage collected.', 'start': 1095.798, 'duration': 8.827}, {'end': 1112.391, 'text': 'coming to final, the final class cannot be inherited and the final method cannot be overridden and the final variable cannot be changed.', 'start': 1104.625, 'duration': 7.766}, {'end': 1117.612, 'text': 'Coming to finally it will be executed whether the exception is handled or not.', 'start': 1113.01, 'duration': 4.602}], 'summary': "Use 'final' to restrict methods and variables, 'finally' for cleanup, and 'finalize' for garbage collection. finally block executes whether exception is handled or not.", 'duration': 26.297, 'max_score': 1091.315, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X41091315.jpg'}], 'start': 748.554, 'title': 'Java exception handling', 'summary': 'Covers the usage of nested try, catch block, multi-catch block, and finally block in java exception handling, demonstrating their functionalities and importance in maintaining the normal flow and executing important codes, such as closing connections and streams, even when exceptions occur.', 'chapters': [{'end': 873.426, 'start': 748.554, 'title': 'Java exception handling', 'summary': 'Covers the usage of nested try, catch block, multi-catch block, and finally block in java exception handling, demonstrating their functionalities and importance in maintaining the normal flow and executing important codes, such as closing connections and streams, even when exceptions occur.', 'duration': 124.872, 'highlights': ['The chapter demonstrates the usage of finally block, emphasizing its importance in executing important codes like closing connections and streams, irrespective of whether exceptions are handled or not.', 'The transcript explains the usage of multi-catch block in Java, highlighting its capability to handle various tasks at the occurrence of various exceptions, showcasing the usage of one try block with multiple catch blocks.', 'It showcases the usage of nested try and catch block, explaining how exceptions are handled and printed, illustrating the usage of nested try and its working in exception handling.', 'The transcript illustrates the usage of catch block and multi-catch block in Java Exception Handling, exemplifying their functionalities in handling and performing tasks at the occurrence of exceptions.']}, {'end': 1112.391, 'start': 873.426, 'title': 'Exception handling in java', 'summary': 'Explains the usage of throw and throws keywords, demonstrating how they are used to throw and declare exceptions, with examples showing the difference between the two and their respective behaviors, including the distinction between final, finally, and finalize.', 'duration': 238.965, 'highlights': ['The chapter explains the usage of throw and throws keywords, demonstrating how they are used to throw and declare exceptions, with examples showing the difference between the two and their respective behaviors. It covers the usage of throw and throws keywords, with examples illustrating the difference between them and their behaviors.', 'It demonstrates how throw is explicitly used to throw an exception, while throws is used to declare an exception, and that checked exceptions can be propagated using throws. Explains the explicit use of throw to throw an exception, the declaration of exceptions using throws, and how checked exceptions can be propagated using throws.', 'It explains the differences between throw and throws, such as throw being followed by an instance and throws being followed by a class, and the limitations on the number of exceptions that can be thrown or declared. Details the distinctions between throw and throws, including the types followed by each, and the limitations on the number of exceptions that can be thrown or declared.', 'The chapter also delves into the distinctions between final, finally, and finalize, detailing their respective use cases in Java. Covers the differences between final, finally, and finalize, explaining their distinct use cases in Java.']}], 'duration': 363.837, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X4748554.jpg', 'highlights': ['The chapter demonstrates the usage of finally block, emphasizing its importance in executing important codes like closing connections and streams, irrespective of whether exceptions are handled or not.', 'The transcript explains the usage of multi-catch block in Java, highlighting its capability to handle various tasks at the occurrence of various exceptions, showcasing the usage of one try block with multiple catch blocks.', 'It demonstrates how throw is explicitly used to throw an exception, while throws is used to declare an exception, and that checked exceptions can be propagated using throws.', 'The chapter also delves into the distinctions between final, finally, and finalize, detailing their respective use cases in Java.']}, {'end': 1452.221, 'segs': [{'end': 1140.901, 'src': 'embed', 'start': 1113.01, 'weight': 0, 'content': [{'end': 1117.612, 'text': 'Coming to finally it will be executed whether the exception is handled or not.', 'start': 1113.01, 'duration': 4.602}, {'end': 1120.873, 'text': 'We already saw how it worked now.', 'start': 1118.052, 'duration': 2.821}, {'end': 1123.394, 'text': "Let's see a user-defined exception.", 'start': 1121.273, 'duration': 2.121}, {'end': 1129.376, 'text': 'Sometimes the built-in exceptions in Java are not able to describe a certain situation.', 'start': 1124.014, 'duration': 5.362}, {'end': 1135.099, 'text': 'in such cases, a user can also create exceptions, and that are called as user-defined exceptions.', 'start': 1129.376, 'duration': 5.723}, {'end': 1137.139, 'text': 'There are two important points.', 'start': 1135.499, 'duration': 1.64}, {'end': 1140.901, 'text': 'first one a user-defined exception must extend the exception class.', 'start': 1137.139, 'duration': 3.762}], 'summary': 'Java allows for the creation of user-defined exceptions, which must extend the exception class.', 'duration': 27.891, 'max_score': 1113.01, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X41113010.jpg'}, {'end': 1260.242, 'src': 'embed', 'start': 1202.106, 'weight': 1, 'content': [{'end': 1204.947, 'text': "Let's see whether it prints the same prescribed value or not.", 'start': 1202.106, 'duration': 2.841}, {'end': 1214.849, 'text': 'Exactly. We got the output as desired, that is, the throw keyword is used to create a new exception and throw it to the catch block,', 'start': 1206.767, 'duration': 8.082}, {'end': 1219.55, 'text': 'and then it got handled and vendor, and when extending that will get the same desired output.', 'start': 1214.849, 'duration': 4.701}, {'end': 1222.991, 'text': 'So this is how you can create a user-defined exception.', 'start': 1220.19, 'duration': 2.801}, {'end': 1225.662, 'text': 'Now coming to the end of the discussion.', 'start': 1224.102, 'duration': 1.56}, {'end': 1232.004, 'text': "Let's see what our custom exceptions and how to pass an exception and modify the same program again.", 'start': 1226.182, 'duration': 5.822}, {'end': 1249.507, 'text': 'So in this case if the number that we entered is more than hundred then it should throw an exception else.', 'start': 1242.266, 'duration': 7.241}, {'end': 1252.008, 'text': 'It should print the provided input is valid.', 'start': 1250.027, 'duration': 1.981}, {'end': 1252.948, 'text': "Let's see how.", 'start': 1252.388, 'duration': 0.56}, {'end': 1260.242, 'text': "After that I'm reading a number here and then trying to validate the input and try block.", 'start': 1254.52, 'duration': 5.722}], 'summary': 'Demonstrates creating and handling user-defined exceptions in a program.', 'duration': 58.136, 'max_score': 1202.106, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X41202106.jpg'}, {'end': 1368.387, 'src': 'embed', 'start': 1344.899, 'weight': 4, 'content': [{'end': 1352.781, 'text': "I'll tell you how if we enter the date in this format, then it should print as valid input or else it should throw an exception.", 'start': 1344.899, 'duration': 7.882}, {'end': 1353.882, 'text': "Let's see how to do that.", 'start': 1352.882, 'duration': 1}, {'end': 1358.644, 'text': 'So in the try block first, I have read the input date and then output date.', 'start': 1354.822, 'duration': 3.822}, {'end': 1360.184, 'text': 'I have created a reference for them.', 'start': 1358.704, 'duration': 1.48}, {'end': 1365.946, 'text': 'And if there is any error in case of changing the date format or by converting the date formats,', 'start': 1360.744, 'duration': 5.202}, {'end': 1368.387, 'text': 'then that exception will be handled in the catch block.', 'start': 1365.946, 'duration': 2.441}], 'summary': 'Code ensures input date format validity and handles exceptions.', 'duration': 23.488, 'max_score': 1344.899, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X41344899.jpg'}], 'start': 1113.01, 'title': 'Exception handling in java', 'summary': "Explains the concept of user-defined exceptions in java, covering the process of creating and handling user-defined exceptions, emphasizing important points, and demonstrating examples with specific outputs. it also discusses creating, handling, and passing exceptions, with examples such as throwing a custom exception if a number is greater than 100 and passing an exception using java's simple date format package.", 'chapters': [{'end': 1201.626, 'start': 1113.01, 'title': 'Exception handling in java', 'summary': 'Explains the concept of user-defined exceptions in java, highlighting the process of creating and handling user-defined exceptions, emphasizing the important points and demonstrating a practical example with a specific output.', 'duration': 88.616, 'highlights': ['The chapter explains the concept of user-defined exceptions in Java, highlighting the process of creating and handling user-defined exceptions, emphasizing the important points and demonstrating a practical example with a specific output.']}, {'end': 1452.221, 'start': 1202.106, 'title': 'Custom exception and exception passing in java', 'summary': "Discusses creating user-defined exceptions, handling them, and passing exceptions in java, with examples such as throwing a custom exception if a number is greater than 100 and passing an exception using java's simple date format package.", 'duration': 250.115, 'highlights': ['The throw keyword is used to create a new exception and throw it to the catch block, and when extending that will get the same desired output.', 'If the number entered is more than hundred then it should throw an exception else it should print the provided input is valid.', 'If the number is greater than hundred then it should throw an exception and that exception is caught in the catch block.', 'In the try block first, I have read the input date and then output date. If there is any error in case of changing the date format or by converting the date formats, then that exception will be handled in the catch block.', 'After changing the date format, it will be this, that is the one which I have given in this format from the input date format, which is in day, month, and year. It changes the output date format by passing the input date to your month and day.']}], 'duration': 339.211, 'thumbnail': 'https://coursnap.oss-ap-southeast-1.aliyuncs.com/video-capture/W-N2ltgU-X4/pics/W-N2ltgU-X41113010.jpg', 'highlights': ['The chapter explains the concept of user-defined exceptions in Java, highlighting the process of creating and handling user-defined exceptions, emphasizing the important points and demonstrating a practical example with a specific output.', 'The throw keyword is used to create a new exception and throw it to the catch block, and when extending that will get the same desired output.', 'If the number entered is more than hundred then it should throw an exception else it should print the provided input is valid.', 'If the number is greater than hundred then it should throw an exception and that exception is caught in the catch block.', 'In the try block first, I have read the input date and then output date. If there is any error in case of changing the date format or by converting the date formats, then that exception will be handled in the catch block.']}], 'highlights': ['Java exception handling provides a powerful mechanism to handle errors and exceptions, making the program more robust and easier to debug.', 'The chapter includes an overview of exceptions hierarchy, comparison between checked and unchecked exceptions, and the basic syntax of exception handling.', 'The session delves into various methods of exception handling, including throw and throws, final, finalize, and finally, and custom exceptions.', 'The chapter discusses the importance of exception handling in Java, including the types of exceptions, the difference between errors and exceptions, and the exception hierarchy with all exceptions and errors types are subclasses of class throwable.', 'Exception handling is vital as it prevents system failures, and Java introduced exception handling mechanism to handle runtime errors, such as class not found, IO exception, SQL exception, etc.', 'Errors are impossible to recover, while exceptions can be recovered by handling them, and they can be either checked or unchecked type, and they can happen either at compile time or runtime.', 'Java virtual machine creates an exception object containing the name, description, and current program state when an exception occurs, and handles it to the runtime system, known as throwing an exception.', 'Distinguishing between checked and unchecked exceptions, where checked exceptions occur at compile time and must be handled, while runtime exceptions are ignored at compilation.', 'Importance of handling exceptions, with the example showcasing the use of try and catch blocks to raise and handle exceptions.', 'The chapter concludes with an overview of various types of exceptions, providing a comprehensive understanding of exception handling in Java.', 'Built-in exceptions in Java libraries are suitable to explain certain error situations like arithmetic exception, array index out-of-bound exception, class not found, IO exception, runtime exception, number format, etc.', 'It discusses the functionality of catch blocks in maintaining the normal flow of execution by handling exceptions, as demonstrated in the scenario of catching an arithmetic exception and printing a custom message.', 'The chapter demonstrates the concept of retrieving the length of a null string, which throws a null pointer exception, illustrating the need for exception handling in such scenarios.', 'The chapter discusses built-in exceptions in Java, including examples of arithmetic exception and handling exception when passing a string variable as an integer, emphasizing the importance of catching exceptions to maintain the normal flow.', 'The chapter explains the process of handling built-in exceptions like arithmetic, number format, and array index out-of-bounds exceptions in Java.', "The program demonstrates nested try blocks in Java, with the first try block resulting in a 'cannot divide by 0' exception and the nested try block resulting in a 'number format exception' being handled.", 'It mentions that when trying to access the seventh element in an array of size 5, an array index out-of-bounds exception occurs, providing a specific example of exception handling.', 'The example emphasizes the usage of nested try blocks for handling multiple exceptions within a Java program.', 'It highlights the importance of understanding the throw and throws methods for handling user-defined exceptions in Java.', "The output of the program shows the handling of exceptions within nested try blocks, with the final statement 'other statement' being printed after the exceptions are handled.", 'The chapter explains the various methods of exceptions, including try, catch, finally, throw, and throws.', 'It also includes an example of nested try blocks within a try block.', 'The try block is used to enclose the code that may throw an exception.', 'The nested try block is a try within a try block, demonstrated with a small example.', 'The chapter demonstrates the usage of finally block, emphasizing its importance in executing important codes like closing connections and streams, irrespective of whether exceptions are handled or not.', 'The transcript explains the usage of multi-catch block in Java, highlighting its capability to handle various tasks at the occurrence of various exceptions, showcasing the usage of one try block with multiple catch blocks.', 'It demonstrates how throw is explicitly used to throw an exception, while throws is used to declare an exception, and that checked exceptions can be propagated using throws.', 'The chapter also delves into the distinctions between final, finally, and finalize, detailing their respective use cases in Java.', 'The chapter explains the concept of user-defined exceptions in Java, highlighting the process of creating and handling user-defined exceptions, emphasizing the important points and demonstrating a practical example with a specific output.', 'The throw keyword is used to create a new exception and throw it to the catch block, and when extending that will get the same desired output.', 'If the number entered is more than hundred then it should throw an exception else it should print the provided input is valid.', 'If the number is greater than hundred then it should throw an exception and that exception is caught in the catch block.', 'In the try block first, I have read the input date and then output date. If there is any error in case of changing the date format or by converting the date formats, then that exception will be handled in the catch block.']}