Description Erling Ellingsen 2005-09-06 13:33:53 EDT

According to the java language spec (section 13.1), an anonymous class inside an anonymous class 
should be named Foo$n$n, not Foo$n as is done by the eclipse compiler (the class name should be the 
*immediately* enclosing class, $, number). This causes Class.getSimpleName() to throw an 
exception, which can cause all kinds of interesting problems in logging and debugging code.

<pre>
public class EclipseBug {
	public static void main(String[] s) {
		new Object() {
			{
				new Object() {
					{
						System.out.println(this.getClass().getName());
						System.out.println(this.getClass().getSimpleName());
					}
				};
			}
		};
	}
}
//</pre>


/ibs/bin$ java EclipseBug
common.EclipseBug$2
Exception in thread "main" java.lang.InternalError: Malformed class name
        at java.lang.Class.getSimpleName(Class.java:1129)
        at common.EclipseBug$2.<init>(EclipseBug.java:10)
        at common.EclipseBug$1.<init>(EclipseBug.java:7)
        at common.EclipseBug.<clinit>(EclipseBug.java:5)

Whereas compiled with javac, the result is

/Users/alf/temp$ java EclipseBug
EclipseBug$1$1

(getSimpleName() returns a blank string)