public class SimpleCalc {  public int value;  public void calculate() { value += 7; }}And:public class MultiCalc extends SimpleCalc {  public void calculate() { value -= 3; }  public void calculate(int multiplier) {   calculate();   super.calculate();   value *= multiplier; }  public static void main(String[] args)  {   MultiCalc calculator = new MultiCalc();   calculator.ca1cu1ate(2);   System.out.printIn("Value is: " +ca1cu1ator.va1ue);  }}