JAVA算法——模拟微信红包

         /*
	 * 微信红包
	 */
	public void weChatRedPacket(double money, int people){
		DecimalFormat df = new DecimalFormat("######0.00");
		int sPeople = people;
　　　　　　　　　 //创建保存每个红包金额的集合
		ArrayList al = new ArrayList();
		double a[] = new double[people];
		if(people == 1){
			a[0]=money;
			al.add(money);
		}else{
			for(int i=0; i <people; i++){
				int f = people-1;
				if(i==f){
					a[i]=Double.parseDouble(df.format(money));
					al.add(a[i]);
				}else{
					a[i]=Double.parseDouble(df.format(Math.random()*(money/sPeople)));
					al.add(a[i]);
					money=money-a[i];
					sPeople=sPeople-1;
				}
			}
		}
　　　　　　　　　 //打乱集合顺序
		Collections.shuffle(al);
		System.out.println(al);
	}