Collections shuffle方法模拟斗地主洗牌发牌

4个人玩牌，最后保留3张底牌：

	public static void main(String[] args) {
		List<Integer> cards =new ArrayList<Integer>();
		//shuffle 洗牌 模拟斗地主
		for(int i=0;i<54;i++){
			cards.add(i); 
		}
		//洗牌
		Collections.shuffle(cards) ;
		//依次发牌
		List<Integer> p1 =new ArrayList<Integer>();
		List<Integer> p2 =new ArrayList<Integer>();		
		List<Integer> p3 =new ArrayList<Integer>();
		List<Integer> last =new ArrayList<Integer>();
		for(int i=0;i<51;i+=3){
			p1.add(cards.get(i));
			p2.add(cards.get(i+1));
			p3.add(cards.get(i+2));
		}
		//最后三张为底牌
		last.add(cards.get(51));
		last.add(cards.get(52));
		last.add(cards.get(53));
		
		System.out.println("第一个人:"+p1);
		System.out.println("第二个人:"+p2);
		System.out.println("第三个人:"+p3);
		System.out.println("底牌为:"+last);
}