code3

gistfile1.java

public class TestClass {

    int a;

    int b;

    public TestClass() {

        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();

        TestClass test3 = new TestClass3();

    }

}

class TestClass2 extends TestClass {

    public TestClass2() {

        super();

        a = 1;

        b = 2;

        print();

    }

}

class TestClass3 extends TestClass2 {

    public TestClass3() {

        print();

    }

}