第6次JAVA作业

import java.util.ArrayList;

import java.util.Collections;

import java.util.Random;

public class ChouJiang {

private ArrayList number;

public ChouJiang(){

number = new ArrayList();

}

public void deal(int i) {

// TODO Auto-generated constructor stub

//向容器中添加奖券

number= new ArrayList<Integer>();
for( i = 1;i <= 100;i++){
number.add(i);

}
//打乱顺序
Collections.shuffle(number);

}

public void display(int n){

//产生n个指定范围（0-number.size（））的随机数

Random r = new Random(); //定义1~100个随机数

for(int i=0;i<n;i++){

int index=r.nextInt(number.size());

System.out.println(number.get(index)+"\t");

number.remove(index);}

}

public static void main(String[] args) {
// TODO Auto-generated method stub

ChouJiang b = new ChouJiang();
b.deal(2000);
System.out.println(".......一等奖.......");
b.display(1);
System.out.println(".......二等奖.......");
b.display(4);
System.out.println(".......三等奖.......");
b.display(8);

}

}