Скачать или смотреть Tracing Java Objects: Inheritance, Polymorphism, Array

What is the output of the following code?

public abstract class A {
protected int a;
public A(int a){
this.a = a+1;
}
public String toString(){
return "a:"+a;
}
}


public class B extends A {
public int b;
public B(){
super(0);
b=0;
}
public B(int b){
this();
a+=b;
}
public String toString(){
a++;
b+=a;
return super.toString() + "b:"+b;
}
}

public class C {
public static void main(String[] args) {
B b[] = new B[3];
b[0] = new B();
b[1] = new B(4);
A a = new B(5);
b[2] = (B)(a);

System.out.println(b[0].b);
b[1].b = b[0].b + 5 * b[2].b;

System.out.println(b[0]+"\n"+b[1]);
System.out.println(b[2]+"\n"+a);
}
}