What am I doing wrong here. These classes in 3 separate files, compile:

// SuperValue.java
public enum SuperValue { A, B; }

// Super.java
public abstract class Super {
 abstract SuperValue method();
}

// Sub.java
public class Sub extends Super {
 public SuperValue method() { return SuperValue.A; }
}

but, if I put them in packages:

// test/SuperValue.java
package test;
public enum SuperValue { A, B; }

// test/Super.java
package test;
public abstract class Super {
 abstract SuperValue method();
}

// test/sub/Sub.java
package test.sub;
import test.SuperValue;
import test.Super;
public class Sub extends Super {
 public SuperValue method() { return SuperValue.A; }
}

javac complains that Sub is not abstract and does not override method method.