java 名单随机抽取

package number;
import java.util.Scanner;
public class chapter03 {
	public static void main(String[] args) {
		Scanner s_num = new Scanner(System.in);
		System.out.println("请输入人数:");
		int sum = s_num.nextInt();
		String[] stu_array = new String[sum];
		//循环输入姓名
		Scanner s_name = new Scanner(System.in);
		for(int i = 0;i < stu_array.length;i++){
			System.out.println("请输入第"+(i+1)+"名同学:");
			stu_array[i] = s_name.next();
		}
		System.out.println("人员名单初始化已完成，是否开始抽取，（1/2）抽取/取消");
		Scanner s_int = new Scanner(System.in);
		if(1 == s_int.nextInt()){
			//产生随机数
			int num = (int)(Math.random()*(stu_array.length)); 	
			System.out.println("抽取的同学是:"+ stu_array[num]);
		}else{
			System.out.println("取消成功");
		}
	}
}