java program to demonstrate multilevel inheritance

1Class X
2{
3   public void methodX()
4   {
5     System.out.println("Class X method");
6   }
7}
8Class Y extends X
9{
10public void methodY()
11{
12System.out.println("class Y method");
13}
14}
15Class Z extends Y
16{
17   public void methodZ()
18   {
19     System.out.println("class Z method");
20   }
21   public static void main(String args[])
22   {
23     Z obj = new Z();
24     obj.methodX(); //calling grand parent class method
25     obj.methodY(); //calling parent class method
26     obj.methodZ(); //calling local method
27  }
28}