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();
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);

}
}