java 构造方法实现简单点名----2019.3.7

package days2;
import java.util.Scanner;
import java.util.Random;

public class task {
 public static void addStu(String[] students) {
  Scanner sc=new Scanner(System.in);
  for(int i=0;i<students.length;i++)
   students[i]=sc.next();
 }
 
 public static void printStu(String[] students) {
  for(int i=0;i<students.length;i++)
   System.out.println(" "+(i+1)+" "+students[i]);}
 
 public static  String randomStu(String[] students) {
 int index=new Random().nextInt(students.length);//随机数范围
  String name=students[index];
  return name;}
 
 
  
 
 public static void main(String[] args) {
  String[] students=new String[3];
  System.out.print( "请输入： ");
  addStu(students);
  //printStu(students);
  String randomName=randomStu(students);
  System.out.print( "请输入： "+randomName);
  
 }

}