constructor

abstract class A1{
public A1(){
this.print();
}

public abstract void print();
}

class B1 extends A1{

private int x = 100;

public B1(int x){
this.x = x;
}
@Override
public void print() {
System.out.println("x = " + this.x);

}

}


public class TestAbstractConstructor {
public static void main(String[] args){
A1 a1 = new B1(20);
//a1.print();
}
}