java list 随机排序 shuffle()

通过 Collections.shuffle(list)来打乱顺序

List<String> list = new ArrayList<String>();
        list.add("mjb");
        list.add("hh");
        list.add("lw");
        list.add("pqj");
        list.add("hj");
        System.out.println("前：");
        for(int i=0;i<list.size();i++){
            System.out.print(list.get(i)+"    ");
        }
        System.out.println("www.1b23.com");
        System.out.println("后：");
        Collections.shuffle(list);
        for(int i=0;i<list.size();i++){
            System.out.print(list.get(i)+"    ");
        }