java 一个数组中m个不同的数 需要分成n组

Question

java 一个数组中m个不同的数 需要分成n组，比如{1,5,7}分成2组：{1}{5,7}；{5}{1,7}；{7}{1,5}，m>=n，这里n=2比较好举例，实际上是n>2情况居多，请大神支招java实现！！！求代码！！！

Answer 1

This is a permutation and combination problem

Answer 2

Yes, this is the problem of dividing m by n. There is currently an implementation of m taking n, but the problem of dividing m by n has not found a Java implementation version. Please give me the code to implement it! !