1. Create the classes:
package p2;
import p1.*;
public class C extends A {
  protected long k(  long a){
    return 1;
  }
  public long k(  int a){
    return 0;
  }
}
package p1;
public class B extends A {
}
package p1;
import p2.*;
public class A {
  public long m(){
    return new C().k(2);
  }
}
2. apply the rename class refactoring to rename B to C
package p1;
import p2.*;
public class A {
  public long m(){
    return new C().k(2);
  }
}

package p1;
public class C extends A {
}

package p2;
import p1.*;
public class C extends A {
  protected long k(  long a){
    return 1;
  }
  public long k(  int a){
    return 0;
  }
}
3. The resulting program does not compile