java - 处理数组中的随机数组

Question

我想打乱数组中的数组，但只有第一个数组

String[][] kaarten = {  {"G", "T","1"}, 
                        {"G", "T","2"},
                        {"G", "T","3"},
                        //green triangle
                        {"R", "T","1"},
                        {"R", "T","2"},
                        {"R", "T","3"},
                        //red triangle
                        {"B", "T","1"},
                        {"B", "T","2"},
                        {"B", "T","3"},
                        //blue triangle
                        {"G", "O","1"},
                        {"G", "O","2"},
                        {"G", "O","3"},
                        //green Oval
                        {"R", "T","1"},
                        {"R", "T","2"},
                        {"R", "T","3"},
                        //Red Oval
                        {"B", "T","1"},
                        {"B", "T","2"},
                        {"B", "T","3"},
                        //Blue Oval
                        {"G", "S","1"},
                        {"G", "S","2"},
                        {"G", "S","3"},
                        //green Square
                        {"R", "T","1"},
                        {"R", "T","2"},
                        {"R", "T","3"},
                        //Red Square
                        {"B", "T","1"},
                        {"B", "T","2"},
                        {"B", "T","3"},
                        //Blue Square
                      };

因此，{"G", "T", "1"} 需要保持不变。

我希望你能理解我所看到的，这有点难以解释。

Answer 1

最简单的方法是创建一个 String[] 列表并使用 Collections.shuffle() :

List<String[]> values = new ArrayList<>();
Collections.addAll(values, kaarten);
Collections.shuffle(values);
values.stream().map(Arrays::toString).forEach(System.out::println);

将显示值被随机重新排列，而不修改内部String[]:

[G, O, 3] 
[R, T, 3]
[G, O, 2]
[R, T, 3]
[R, T, 1]
...