10.29

package zy;
public class K {

      public int id;
      public String name;
      public int age;
      public String city;
      public String introduce() {
       return  + id +  ":   姓名  " + name + ", 年龄" + age + ", 地址" + city ;
       }  
     }

 package zy;
 public class L {
 
 public static void main(String[] args) {
      L p1=new L();
      L p2=new L();
      L p3=new L();
      L p4=new L();
      p1.id=100000;   p1.name="A1";   p1.age=19;   p1.city="上海";
      p2.id=200000;   p2.name="A2";   p2.age=18;   p2.city="北京";
      p3.id=300000;   p3.name="A3";   p3.age=19;   p3.city="深圳";
      p4.id=400000;   p4.name="A4";   p4.age=19;   p4.city="广州";
      System.out.println(p1.introduce());
      System.out.println(p2.introduce());
      System.out.println(p3.introduce());
      System.out.println(p4.introduce());

   }

 }