PLEASE EXPLAIN JAVA QUESTION

What is the output of the following code:

public class C extends B {

public static void main(String[] args) {

new C();

}

public C() {

System.out.println("C");

}

class B extends A {

public B() {

this("Java");

System.out.println("B");

}

public B(String s) {

System.out.println(s);

}

class A {

public A() {

System.out.println("A");

}