super

一、理解

super.属性：在子类中，调用父类非私有化的成员属性
super.方法：在子类中，调用父类非私有化的成员方法
super()：在子类构造方法中调用父类非私有的构造方法

二、案例

需求：编写中国人和日本人的类

分析：

​ 人类：

​ 属性：姓名、性别、年龄

​ 方法：吃饭饭、睡觉觉

​ 中国人类 继承 人类：

​ 属性：身份证

​ 方法：打太极

​ 日本人类 继承 人类：

​ 属性：年号

​ 方法：拍电影

1、主方法入口

package com.xx.test03;public class Test01 {public static void main(String[] args) {Chinese c = new Chinese("侯小康", '男', 23, "12345678901");c.eat();c.sleep();c.playTaiJi();System.out.println("------------------------------");Japanese j = new Japanese("波多野结衣", '女', 18, "令和");j.eat();j.sleep();j.playVedio();}
}

2、Person-父类

package com.qf.test03;public class Person {//私有化属性
private String name;
private char sex;
private int age;
//无参数构造方法
public Person() {
}
//有参数构造方法
public Person(String name, char sex, int age) {this.name = name;this.sex = sex;this.age = age;
}
//set/get方法
public String getName() {return name;
}public void setName(String name) {this.name = name;
}public char getSex() {return sex;
}public void setSex(char sex) {this.sex = sex;
}public int getAge() {return age;
}public void setAge(int age) {this.age = age;
}public void eat(){System.out.println(this.name + "吃饭饭");
}public void sleep(){System.out.println(this.name + "睡觉觉");}
}

3、Chinese-子类

package com.xx.test03;public class Chinese extends Person{private String id;public Chinese() {}public Chinese(String name, char sex, int age, String id) {super(name, sex, age);this.id = id;}public String getId() {return id;}public void setId(String id) {this.id = id;}public void playTaiJi(){System.out.println(super.getName() + "打太极");}}

4、 Indians -子类

package com.xx.test03;public class  Indians extends Person{
private String yearNum;public Indians() {
}public Indians(String name, char sex, int age, String yearNum) {super(name, sex, age);this.yearNum = yearNum;
}public String getYearNum() {return yearNum;
}public void setYearNum(String yearNum) {this.yearNum = yearNum;
}public void playVedio(){System.out.println(super.getName() + "拍电影");}
}