Most efficient way to prevent an infinite recursion in toString()?

Question

To string on a collection can get into a infinite loop if somewhere in the graph of collected items is a reference back to itself. See example below.

Yes, good cod

Answer 1

You can create toString which takes an identity hash set.

public String toString() {
   return toString(Collections.newSetFromMap(new IdentityHashMap()));
}

private String toString(Set