What's the quickest way to remove an element from a Map by value in Java?

Question

What\'s the quickest way to remove an element from a Map by value in Java?

Currently I\'m using:

    DomainObj valueToRemove = new DomainObj();
    S         


        

Answer 1

If you don't have a reverse map, I'd go for an iterator.

DomainObj valueToRemove = new DomainObj();

for (
    Iterator> iter = map.entrySet().iterator();
    iter.hasNext();
) {
    Map.Entry entry = iter.next();
    if (valueToRemove.equals(entry.getValue())) {
        iter.remove();
        break; // if only want to remove first match.
    }
}