java 生成隨機數組的方法

 1  //得到數組內容從0到log-1的隨機數組
 2   public int[] getrandomarray(int log){
 3                 int[] result = new int[log];
 4                 for (int i = 0; i < log; i++) {
 5                         result[i] = i;
 6                 }
 7                 for (int i = 0; i < log; i++) {
 8                         int random = (int) (log * Math.random());
 9                         int temp = result[i];
10                         result[i] = result[random];
11                         result[random] = temp;
12                 }
13                 return result;
14             }