java-重写课堂练习1
java-重写课堂练习2
Person类源码
package com.Start300;
public class Person{//先定义一个父类Person
private String name;
private int age;
public Person(String name, int age) {
this.name = name;
this.age = age;
}
public String say(){
return “name=”+name+"\t"+“age=”+age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
}
Student类源码
package com.Start300;
public class Student extends Person{//继承Person
private int id;
private double score;
public Student(String name, int age, int id, double score) {
super(name, age);//这里会调用父类构造器
this.id = id;
this.score = score;
}
public String say(){//这里体现super的一个好处 代码复用
return super.say()+"\t"+“id=”+id+"\t"+“score=”+score;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public double getScore() {
return score;
}
public void setScore(double score) {
this.score = score;
}
}
OverrideExercise类源码
package com.Start300;
public class OverrideExercise {
public static void main(String[] args) {//在主方法里输出
Person jack = new Person(“jack”, 10);
System.out.println(jack.say());
Student smith = new Student("smith", 20, 123456, 99.8);
System.out.println(smith.say());
}
}