Java基础系列

package com.test7;

public class test7 {
    public static void main(String[] args) {
        Son son = new Son(1000, "张三");
        /**
         * 打印显示
             Father的构造函数1000 张三
             Son的构造函数1000 张三
         */
    }
}

class Father {
    private int userId;
    private String userName;

    public Father(int userId, String userName) {
        System.out.println("Father的构造函数" + userId + " " + userName);
        this.userId = userId;
        this.userName = userName;
    }
}

class Son extends Father {
    /**
     * 子类中调用父类的构造函数
     *
     * @param userId
     * @param userName
     */
    public Son(int userId, String userName) {
        super(userId, userName);
        System.out.println("Son的构造函数" + userId + " " + userName);
    }
}