code1

gistfile1.java

public class TestClass {

    int a;

    int b;

    public TestClass() {

        a = 5;

        b = 6;

        print();

    }

    public void print() {

        System.out.println(this.getClass() + ": a:" + this.a + ", b:" + this.b);

    }

    public static void main(String[] args) {

        TestClass test1 = new TestClass();

        TestClass test2 = new TestClass2();

    }

    class TestClass2 extends TestClass {

        public TestClass2() {

            super();

            a = 1;

            b = 2;

            print();

        }

        public void print() {

            System.out.println(this.getClass() + ": a:" + this.a + ", b:" + this.b);

        }