java大题(5)

this.x=x;

this.y=y; }

public double distance(Point p){

return Math.sqrt((x-p.x)*(x-p.x)+(y-p.y)*(y-p.y)); }

public double distance(int x,int y){

return Math.sqrt((this.x-x)*(this.x-x)+(this.y-y)*(this.y-y)); }

public static double distance(Point x,Point y){

return Math.sqrt((x.x-y.x)*(x.x-y.x)+(x.y-y.y)*(x.y-y.y));

} }

public class hc {

public static void main(String args[]){

Point p=new Point(3,9);

Point a=new Point(7,6);

System.out.println(p.distance(a));

System.out.println(p.distance(5,8));

System.out.println(Point.distance(p,a)); }

class Person{

String name;

char sex; int age;

public Person(String name,char sex,int age){

this.name=name;

this.sex=sex;

this.age=age; } }

class teacher extends Person{

String pro;

String partement;

public teacher(String name,char sex,int age,String pro,String partement){

super(name,sex,age);

this.pro=pro;

this.partement=partement; }

public String toString(){

return name+\ } }

六（2）定义person类，子类student类。

class student extends Person{

String num;

String time;

String zhuanye;

public student(String time,String zhuanye){

super(name,sex,age);

this.num=num;

this.time=time;

this.zhuanye=zhuanye;

name,char sex,int age,String num,String

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