# Wednesday, July 16, 2014
« Java Security Fixes | Main | New Development Snapshot »
Java Method Overriding Is FUBAR Part 10 of ∞

Yesterday's JDK 7u65 and 8u11 updates changed method overriding yet again and, of course, it is still broken.

Take this example:

package pkg1;

public class A {
  { foo(); }
  void foo() { System.out.println("A.foo"); }
}

package pkg2;

public class B extends pkg1.A {
  { foo(); }
  void foo() { System.out.println("B.foo"); }
}

package pkg1;

public class C extends pkg2.B {
  { foo(); }
  void foo() { System.out.println("C.foo"); }
}

package pkg2;

public class D extends pkg1.C {
  { foo(); }
  void foo() { System.out.println("D.foo"); }
}

public class test {
  public static void main(String[] args) {
    new pkg2.D();
  }
}

Running this with JDK 8u5 yields:

D.foo
D.foo
D.foo
D.foo

Which is, of course, wrong. In yesterday's updates they tried to fix this, but only partially succeeded:

D.foo
D.foo
C.foo
D.foo

The sensible output would be:

C.foo
D.foo
C.foo
D.foo

Wednesday, July 16, 2014 1:27:41 PM (W. Europe Daylight Time, UTC+02:00)  #    Comments [2]