学生点名器

package g666.example2;

import java.util.ArrayList;
import java.util.Random;

public class callNameDemo {

    public static void main(String[] args) {
        //创建一个集合，用来存储
        ArrayList<Stdent> array=new ArrayList<Stdent>();
        addStudnet(array);
        look(array);
        randomStudentname(array);

    }
    
    //添加学生到集合里面
    public static void addStudnet(ArrayList<Stdent> array) {
        Stdent s1=new Stdent();
        s1.name="张三"; s1.age=22;
        Stdent s2=new Stdent();
        s2.name="李四"; s2.age=23;
        Stdent s3= new Stdent();
        s3.name="王五";s3.age=24;
        
    }
    //查看学生
    public static void look(ArrayList<Stdent> array) {
        for(int a =0; a<array.size(); a++) {
            System.out.println(array.get(a).name+"  "+array.get(a).age);
        }
    }
    //随机查看
    public static void randomStudentname(ArrayList<Stdent> array) {
        int random=new Random().nextInt(array.size());
        System.out.println(array.get(random).name);
       
    }
    

}
class Stdent {
    int age;
    String name;
}

 

转载于:https://www.cnblogs.com/zhilili/p/10670699.html