SE701:multiple-dispatch.java

class multiple {

  static class A {
    void foo( B b ) {
      System.out.println( "foo called on A B" );
    }

    void foobarbaz( SubB b ) {
      System.out.println( "foo called on A SUB-B" );
    }
    
  }

  static class SubA extends A {
    void foo( B b ) {
      System.out.println( "foo called on SUB-A B" );
    }
    
    void foobarbaz( SubB b ) {
      System.out.println( "foo called on SUB-A SUB-B" );
    }
  }
  
  static class B { }

  static class SubB extends B { }

  static public void main( String[] args ) {
    A just_a = new A( );
    B just_b = new B( );
    A sub_a = new SubA( );
    B sub_b = new SubB( );

    just_a.foo( just_b );
    just_a.foo( sub_b );

    sub_a.foo( just_b );
    sub_a.foo( sub_b );
  }

}