Description Tushar Pokle 2005-06-08 04:30:22 EDT

The following code executes differently depending on whether it is compiled
using the Eclipse compiler (3.1 RC1), or Sun's javac.

public class TooManyTimes {

    public static void main(String[] args) {
        new InnerClass().start();
    }

    public static class InnerClass {
        public Object start() {
            System.err.println("So long!");
            try {
                return null;
            } finally {
                System.err.println("And thanks for all the fish!");
                foo();
            }
        }

        private void foo() {
            throw new IllegalStateException("Gah!");
        }
    }

}


The output generated when compiled with eclipse is:
So long!
And thanks for all the fish!
And thanks for all the fish!
Exception in thread "main" java.lang.IllegalStateException: Gah!
	at TooManyTimes$InnerClass.foo(TooManyTimes.java:19)
	at TooManyTimes$InnerClass.start(TooManyTimes.java:14)
	at TooManyTimes.main(TooManyTimes.java:4)




The output when compiled with javac is:
So long!
And thanks for all the fish!
Exception in thread "main" java.lang.IllegalStateException: Gah!
        at TooManyTimes$InnerClass.foo(TooManyTimes.java:19)
        at TooManyTimes$InnerClass.start(TooManyTimes.java:14)
        at TooManyTimes.main(TooManyTimes.java:4)




The difference is that "And thanks for all the fish!" is printed twice for the
eclipse compiled version :-) The finally clause is executed twice!!!