JAVA练习题8

package cn.person.www;

 

public class person {

     

    public int id;

    public String name;

    public int age;

    public String city;

    public String introduce() {

        return "我是" + id + "号, 叫  " + name + ", 今年" + age + "岁了, 来自" + city ;

    }

 public person(int id,String name,int age,String city) {

     this.id=id; //this关键字，表达的含义是当前对象 .表示当前对象的某个调用

     this.name=name;

     this.age=age;

     this.city=city;

 }

         

}

 package cn.person.www;

 

public class Demoperson {

 

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        person p1=new person(001,"刘备",40,"北京");

        person p2=new person(002,"关羽",37,"北京");

        person p3=new person(003,"张飞",45,"北京");

        person p4=new person(004,"诸葛亮",25,"北京");

         

        System.out.println(p1.introduce());

        System.out.println(p2.introduce());

        System.out.println(p3.introduce());

        System.out.println(p4.introduce());

         

    }

 

}