frog:~/workspaces/test/Generic11 $ ls -la
total 7
drwxr-xr-x 2 gafter 512 Feb 4 22:14 .
drwxr-xr-x 116 gafter 3072 Feb 4 22:19 ..
-rw-r--r-- 1 gafter 75 Feb 4 22:14 MyColor.java
-rw-r--r-- 1 gafter 82 Feb 4 14:53 MyComparable.java
-rw-r--r-- 1 gafter 125 Feb 4 22:11 MyEnum.java
frog:~/workspaces/test/Generic11 $ cat -n MyColor.java
     1 class MyColor extends MyEnum<MyColor> {
     2 public static void main() {}
     3 }
frog:~/workspaces/test/Generic11 $ cat -n MyComparable.java
     1 interface MyComparable<T extends MyComparable<T>> {
     2 int compareTo(T other);
     3 }
frog:~/workspaces/test/Generic11 $ cat -n MyEnum.java
     1 class MyEnum<E extends MyEnum<E>> implements MyComparable<E> {
     2
     3 public final int compareTo(E other) {
     4 return 0;
     5 }
     6 }
frog:~/workspaces/test/Generic11 $ newjavac -gj *.java
frog:~/workspaces/test/Generic11 $ /usr/java1.4/bin/java -Xfuture MyColor
Exception in thread "main" java.lang.VerifyError: class MyColor overrides final method .
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:509)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:246)
at java.net.URLClassLoader.access$100(URLClassLoader.java:54)
at java.net.URLClassLoader$1.run(URLClassLoader.java:193)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:186)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:265)
at java.lang.ClassLoader.loadClass(ClassLoader.java:262)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:322)
frog:~/workspaces/test/Generic11 $ jdis MyColor.class
super class MyColor
extends MyEnum
{


Method "<init>":"()V"
stack 1 locals 1
{
aload_0;
invokespecial Method MyEnum."<init>":"()V";
return;
}

public static Method main:"()V"
stack 0 locals 0
{
return;
}

public Method compareTo:"(LMyEnum;)I"
stack 2 locals 2
{
aload_0;
aload_1;
checkcast class MyColor;
invokespecial Method MyEnum.compareTo:"(LMyEnum;)I";
ireturn;
}

} // end Class MyColor
frog:~/workspaces/test/Generic11 $