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…
ClassNotFoundException in Java is thrown if an application tries to load a class but the class with the specified name is not found. java.lang.ClassNotFoundException ClassNotFoundException in Java is a checked exception which means it subclasses from Exception class (not from RuntimeException). This exception is thrown if you try to load…
In this post we’ll discuss about java.lang.UnsupportedClassVersionError and how to fix it. When is UnsupportedClassVersionError in Java thrown UnsupportedClassVersionError is thrown when the Java Virtual Machine attempts to read a class file whose major and minor version numbers are not supported by the current JVM version. To understand it better…
In this post we’ll discuss about java.util.InputMismatchException and how to fix it. InputMismatchException is thrown when you are trying to read tokens through a Scanner class instance and the input retrieved doesn’t match the pattern for the expected type. InputMismatchException in Java Scanner class in Java can be used to…
