java - Organizing array of unknown number of constants in all possible ways -

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this question has answer here:

what best way of looping through array, ending organizing in possible ways can organized in?

suppose have array:

{a, b, c, d}

what organize so:

{b, a, c, d} {b, d, c, a}

and forth, looping around creating 1 array analyze per looping.

thank you,


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