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Random.java

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package mine.eight.random;

import java.util.Scanner;

public class Random {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

int number = (int) (Math.random()*5);//[0,5)

String[] name = {"张三","李四","王五","小明","武丽娟"};

System.out.print("1.抽奖\t2.退出");

int num = sc.nextInt();

if(num==1){

System.out.println("幸运用户为："+ name[number]);

}else{

System.out.println("退出抽奖系统.");

}

}

}