class Base { public int x = 42; public String y = null; public Base() { x = 43; } public Base(String arg) { y = arg; } public Base(int arg) { x = arg; } } class Test1 extends Base { public Test1() { } } class Test2 extends Base { public Test2() { super(); } } class Test3 extends Base { public Test3() { super("arg"); } } class Test4 extends Base { public Test4(int arg) { super(arg); } } public class Ctor3 { public static void main(String[] args) { Test1 t1 = new Test1(); System.out.println(43 == t1.x ? 1 : 0); Test2 t2 = new Test2(); System.out.println(43 == t2.x ? 1 : 0); Test3 t3 = new Test3(); System.out.println("arg" == t3.y ? 1 : 0); System.out.println(42 == t3.x ? 1 : 0); Test4 t4 = new Test4(10); System.out.println(10 == t4.x ? 1 :0); } }