different inheritence depending on package

[Frank Fredstone]

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.

 

[Manish Pandit]

Hi Frank,

This is because the abstract method you declared is default (package)
scoped. It is not visible outside the current package. If you change
the signature from

abstract SuperValue method();

to public abstract SuperValue method();

it will compile and work fine.

-cheers,
Manish