In the execution of the method code, if an exception condition occurs, normal flow of the method is disrupted. In order to handle the exceptional condition an exception object is created and thrown. That exception may be handled in the method where that exception is thrown or it may be…
Code in your method may throw exceptions that your method doesn’t handle. In that case you need to specify those exceptions along with the method declaration. That way calling method can provide exception handling mechanism for those exceptions. To specify the exceptions in your method declaration you can use throws…
In this post we’ll see some of the differences between checked and unchecked exceptions in Java. Before going into checked exception Vs unchecked exception let’s try to understand which exception classifies as a checked exception and which one as unchecked. Table of contents Checked exception in Java Unchecked exception in…
In Java five keywords are used for exception handling namely – try, catch, finally, throw and throws. Out of these five, throw and throws keywords sound quite similar causing confusion thus the question what are the differences between throw and throws in Java exception handling. Throw vs Throws in java…
In the post try-catch block we have already seen some examples of exceptions but all those exceptions are thrown by Java run time. You may choose to throw an exception explicitly in your Java code, that can be done using throw statement in Java. General form of Java throw statement…
Using chained exception in Java you can associate one exception with another. Chained exception helps in the scenario where one exception causes another exception. The exception that will be thrown is the second exception in such scenario but you can set the cause of original exception in the second exception…
In this post some of the exception handling best practices in Java are listed. Following these best practices in your Java code will help you in writing robust code. Java Exception handling best practices 1. Don’t ignore exception– Exception handling especially the checked exception gives you a chance to recover…
In a child class you can override methods of the super class and provide a different implementation. But, what if that method in super class declares exceptions using throws clause. Does the overridden method in sub class inherit those exception declarations too, can you override those exceptions in the overridden…
If hearing the term try-catch block is giving you an idea that you can have a try block and a single associated catch block then that is a wrong idea. You can have multiple catch blocks associated with a try block. In this post we’ll see examples of multiple catch…
In this post we’ll discuss about java.lang.NoClassDefFoundError and how to fix it. When is NoClassDefFoundError in Java thrown NoClassDefFoundError in Java is thrown when a class is present at compile time but at runtime when the JVM or a ClassLoader instance tries to load in the definition of a class…
