点名器：用于随机点名

最新推荐文章于 2023-09-11 20:07:24 发布

原创最新推荐文章于 2023-09-11 20:07:24 发布 · 294 阅读

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#随机抽取 #随意输出

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import java.util.ArrayList;
import java.util.Random;
public class CallNameDemo{
public static void main (String args[]){
  ArrayList array = new ArrayList();
  addStudent(array);
  look(array);
  randomStudentName(array);
}
//存储
public static void addStudent(ArrayList array){
  Student s1 = new Student();
  s1.name = “张三”;s1.age = 12;
  Student s2 = new Student();
  s2.name = “李四”;s2.age = 18;
  Student s3 = new Student();
  s3.name = “王五”;s3.age = 16;
  Student s4 = new Student();
  s4.name = “赵六”;s4.age = 14;
  array.add(s1);array.add(s2);
  array.add(s3);array.add(s4);
}
//查看
public static void look(ArrayList array){
  for (int a = 0 ; a < array.size(); a++){
   System.out.println(array.get(a).name+" "+array.get(a).age+“岁”);
  }
}
//抽取
public static void randomStudentName(ArrayList array){
  int random = new Random().nextInt(array.size());
  System.out.println("幸运学生是 :   “+array.get(random).name+” "+array.get(random).age+“岁”);
}
}
class Student{
int age ;
String name;
}