Java invert map

Question

I need create inverse map - select unique values and for them find keys. Seems that only way is to iterate all key/value pairs, because entrySet returns set of so value not

Answer 1

Take a look at Google Guava BiMap.

Example usage

Map map = new HashMap<>();
map.put(1, "one");
map.put(2, "two");

Map inverted = HashBiMap.create(map).inverse();