super invokes the version of this method that is next up the hierarchical tree : overridden method « Object Oriented « SCJP

1. SCJP
2. Object Oriented
3. overridden method

public class MainClass {
  public static void main(String[] argv) {
    DecoratedRectangle r = new DecoratedRectangle();

    System.out.println(r);
  }
}

class Shape {
  public String toString() {
    return "shape";
  }

}

class Rectangle {
  private int x, y, w, h;

  public String toString() {
    return "x = " + x + ", y = " + y + ", w = " + w + ", h = " + h;
  }
}

class DecoratedRectangle extends Rectangle {
  private int borderWidth;

  public String toString() {
    return super.toString() + ", borderWidth = " + borderWidth;
  }
}