JavaInheritanceTest1

package com.sample2;

class Father {
    public int num1 = 0;
    public int num2 = 0;

    public void show() {
        System.out.printf("num1=%d, num2=%d\n", num1, num2);
    }
}

class Son extends Father {
    public void setNum(int a1, int a2) {
        num1 = a1;
        num2 = a2;
    }
}

public class JavaInheritanceTest1 {
    public static void main(String[] args) {
        Son son = new Son();
        son.setNum(10, 20);
        son.show();
    }
}