Java For Dummies Quick Reference

throw Statement

A throw statement lets you throw your own exceptions. The throw statement has the following basic format:

throw new exception-class ();

The exception-class can be Exception or a class that’s derived from Exception.

Here’s a snippet of code that demonstrates the basic structure of a method that throws an exception:

public static void doSomething(boolean t)

throws Exception

{

if (t)

throw new Exception();

}

Here, the doSomething method accepts a Boolean value as a parameter. If this value is true, it throws an exception; otherwise, it doesn’t do anything.

Note: If a method contains a throw statement, it must include a throws clause in its declaration.

For more information, see Exceptions.