生成编号从1到120的整个列表随机播放列表。就拿第一个元素（和删除）

Generate the whole list of numbers from 1 to 120. Shuffle the list. Take the first element (and remove it)

List<Integer> list = new LinkedList<Integer>();
for (int i = 1; i <= 120; i++) {
    list.add(i)
}
Collections.shuffle(list);
...
int random = list.remove(0);
...
int otherRandom = list.remove(0);

为您在你用完了数字的情况下，list.empty（）。如果为空，再创建列表，并将它洗。

Check for list.empty() in case you run out of numbers. If empty, create the list again and shuffle it.