public static void main(String[] args) {

List<String> list = new ArrayList<String>();

List<String> randomList = new ArrayList<String>();

建立有順序的list

for (int i = 0; i < 10; i++) {

list.add(i, String.valueOf(i));

               }

for (String i : list) {

System.out.println("輸出的數字為"+i);

                          }

//迴圈三次輸出打亂的list

for (int k = 0; k <3; k++) {

//removeListElement(list,5);

randomList = randomListElement(list,5);

System.out.println("打亂之後的順序為----------");

for (String i : randomList) {

System.out.println("打亂之後輸出的數字為"+i);

                              }

                     }

            }

private static List<String> randomListElement(List<String> list, int i) {

List<String> randomList = new ArrayList<String>();

//隨機打亂list

Collections.shuffle(list);

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

randomList.add(list.get(j));

       }

return randomList;

  }