consider the following code,

public interface test
{
public void doNothing ()
{
System.out.println ("get some Errors !");
}
}

Old Javac (1.2.2) emits only one error, while the JavaC, (1.3 and 1.4) emits
two messages (as followed).

jtools-sqe:/home/vr128054/vertest/work 198 % javac test.java
test.java:4: interface methods cannot have body
        {
        ^
test.java:3: interface methods cannot have body
        public void doNothing ()
                    ^
2 errors

jtools-sqe:/home/vr128054/vertest/work 200 % javac -J-version
java version "1.4.0-beta2"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-beta2-b76)
Java HotSpot(TM) Client VM (build 1.4.0-beta2-b76, mixed mode)