java编程思想第四版第九章习题

package net.mindview.interfaces;
abstract class Base{
    public Base(){
        print();
    }
    abstract void print();
}
public class Test3 extends Base{
    private int i = 5;
    @Override
    void print() {
        System.out.println(i);
    }
    public static void main(String[] args) {
        Test3 t = new Test3();
        t.print();
    }
}

0
5