extendsjava,Java继承（JavaExtends）

package main;

public class Extends {

public static void main(String[] args) {

// new Person("超级帅气的杨木发",19).getInfo() ;

Student student &＃61; new Student("肉肉","最牛的皮的那种","帅气的杨木发",19) ;

student.getInfo() ;

student.getSuperClassInfo() ;

}

}

class Person{

String name ;

int age ;

public Person(){

//this(name,age) ;

System.out.println("我是无参构造&＃xff0c;是谁在调用我&＃xff01;");

}

public void Person(String parameter ){

if(parameter.equals("New超类"))

System.out.println("超类构造被调用了&＃xff0c;暴走吧超类&＃xff01;") ;

if(parameter.equals(null))

System.out.println("超类构造被调用了&＃xff0c;但你好歹也传点儿东西呀硬是的。");

}

public Person(String name,int age){

this() ;

this.name&＃61;name ;

this.age&＃61;age ;

System.out.println("是我&＃xff01;我是Person双参构造&＃xff0c;我在为Person Name和age初始化的时候调用的你&＃xff0c;你能奈我何&＃xff01;") ;

}

public void setName(String name) {

this.name &＃61; name ;

}

public void setAge(int age){

this.age&＃61;age ;

}

public String getName() {

return name;

}

public int getAge() {

return age;

}

public void getInfo(){

System.out.println("名字&＃xff1a;"&＃43;this.name&＃43;"、年龄&＃xff1a;"&＃43;this.age) ;

}

}

class Student extends Person{

String school ;

String achievement ;

public Student(){}

public Student(String school,String achievement,String name,int age){

super(name,age) ;

this.school&＃61;school ;

this.achievement&＃61;achievement ;

}

public void setSchool(String school) {

this.school &＃61; school;

}

public void setAchievement(String achievement) {

this.achievement &＃61; achievement;

}

public String getSchool() {

return school;

}

public String getAchievement() {

return achievement;

}

public void getSuperClassInfo(){

super.getInfo();

}

&＃64;Override

public void getInfo() {

System.out.println("学校&＃xff1a;"&＃43;this.school&＃43;"、成绩&＃xff1a;"&＃43;this.achievement) ;

}

}

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