gistfile1.txt

|  Welcome to JShell -- Version 11.0.3
|  For an introduction type: /help intro

jshell> class Hack implements Comparator<int[]> {
   ...> 
   ...>     @Override
   ...>     public int compare(int[] e1, int[] e2) {
   ...>         int[] copy1 = Arrays.copyOf(e1, e1.length);
   ...>         int[] copy2 = Arrays.copyOf(e2, e2.length);
   ...>         Arrays.sort(copy1);
   ...>         Arrays.sort(copy2);
   ...>         return Arrays.equals(copy1, copy2) ? 0 : 1;
   ...>     }
   ...> }
|  created class Hack

jshell>         Set<int[]> result = new TreeSet<>(new Hack());
result ==> []

jshell>         int[] x = {1,2,3};
x ==> int[3] { 1, 2, 3 }

jshell>         int[] z = {2,1,3};
z ==> int[3] { 2, 1, 3 }

jshell>         int[] m = {2,1,3};
m ==> int[3] { 2, 1, 3 }

jshell> 

jshell>         result.add(x);
$6 ==> true

jshell>         result.add(z);
$7 ==> false

jshell>         result.add(m);
$8 ==> false

jshell> 

jshell>         for (int[] arr : result) {
   ...>             System.out.println(Arrays.toString(arr));
   ...>         }
[1, 2, 3]

jshell> result.add(new int[]{4,5,6})
$10 ==> true

jshell> result.add(new int[]{1,5,6})
$11 ==> true

jshell> result.add(new int[]{1,7,6})
$12 ==> true

jshell> result.add(new int[]{3,7,6})
$13 ==> true

jshell> result.add(new int[]{2,3,1})
$14 ==> true

jshell> result.add(new int[]{4,5,6})
$15 ==> false

jshell> result.add(new int[]{4,6,5})
$16 ==> false

jshell>         for (int[] arr : result) {
   ...>             System.out.println(Arrays.toString(arr));
   ...>         }
[1, 2, 3]
[4, 5, 6]
[1, 5, 6]
[1, 7, 6]
[3, 7, 6]
[2, 3, 1]

jshell>