将list集合，元素随机打乱

2024-08-24 01:48:57

for循环+随机数实现相同位置的元素交换

public <T> void shuffle(List<T> list) {

        int size = list.size();

        Random random = new Random();

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

            int randomPos = random.nextInt(size);

            T temp = list.get(i);

            list.set(i, list.get(randomPos));

            list.set(randomPos, temp);

        }

    }

Collections.swap实现

public <T> void shuffle(List<T> list) {

        int size = list.size();

        Random random = new Random();

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

            int randomPos = random.nextInt(size);

            Collections.swap(list, i, randomPos);

        }

    }

Collections.shuffle实现

public <T> void shuffle(List<T> list)

 {

Collections.shuffle(list);

}

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