how to remove entry from hashmap by Value?

Question

I need a method to remove a entryset from hashmap by it's value. Is there a simple method without iteration?

Answer 1

There's a simple method, but it'll use iteration internally. (There's no way around that.)

map.values().remove(valueToRemove);

Answer 2

Not in HashMap but google-guava has a BiMap and you could do it like below pseudo-code

BiMap m=new HashBiMap();
m.inverse().remove(valueYouWantToRemove)