導語：shuffle演算法(洗牌演算法)就是將順序打亂，一個典型的應該就是音樂播放器隨機播放，下面是Java中 shuffle 演算法的使用，一起來學習下吧：
Fisher–Yates shuffle 基本思想(Knuth shuffle )：
To shuffle an array a of n elements (indices 0..n-1):
for i from n 1 downto 1 do
j ← random integer with 0 ≤ j ≤ i
exchange a[j] and a[i]
JDK源程式碼如下：
程式碼如下:
/**
* Moves every element of the list to a random new position in the list.
*
* @param list
* the List to shuffle
*
* @throws UnsupportedOperationException
* when replacing an element in the List is not supported
*/
public static void shuffle(List list) {
shuffle(list, new Random());
