How to put an Entry into a Map?

Question

Is there any way that I can put a whole Entry object to a Map object like:

map.put(entry);

instead of passing a k

Answer 1

Solution if you're using Java Platform SE 8:

SimpleEntry and SimpleImmutableEntry classes implement interface Map.Entry

import java.util.AbstractMap.SimpleEntry;
import java.util.AbstractMap.SimpleImmutableEntry;

List> map = new ArrayList<>(); 
map.add(new SimpleEntry(key,value));
map.add(new SimpleImmutableEntry(key,value)); // constructs immutable entries for thread-safe operation