Why does EnumSet have many overloaded “of” methods?

Question

While going through the EnumSet of method, I have seen multiple overloaded implementations of of method:

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Answer 1

varags creates an array, that is when we call

void x(int...x) {...}
..
x(1);

Compiler replaces last line with this:

x(new int[] {1});

It will not happen if we have an overloaded method with 1 arg:

void x(int...x) {...}
void x(int x) {...}

Then compiler will choose the second method.