Each method in a parent class can be overridden at most once in any one subclass. : overridden method « Object Oriented « SCJP

1. SCJP
2. Object Oriented
3. overridden method

public class MainClass {
  public static void main(String[] argv) {
    MySubclass sub = new MySubclass();
    sub.calc(1, 2);
    System.out.println();
  }
}

class MyClass {

  public void calc(int i, int i1) {
  }
}

class MySubclass extends MyClass {
  public void calc(int i, int i1) {
  }

  public void calc(int i, int i1) {
  }

}

Duplicate method calc(int, int) in type MySubclass