Java Utililty Methods Map Remove

List of utility methods to do Map Remove

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Description

The list of methods to do Map Remove are organized into topic(s).

Method

booleanremove(Map map, String key)
remove 
Iterator<?> it = map.keySet().iterator();
while (it.hasNext()) {
    Object keyObject = it.next();
    if (keyObject instanceof String) {
        String k = (String) keyObject;
        if (k.compareTo(key) == 0) {
            it.remove();
            return true;
...
booleanremove(Map> map, K key, V value)
remove 
boolean removed = false;
Set<V> values = map.get(key);
if (values != null) {
    removed = values.remove(value);
    if (values.isEmpty())
        map.remove(key);
return removed;
...
voidremove(Map map, Collection keys)
 
if (map == null || map.isEmpty()) {
    return;
if (keys == null || keys.isEmpty()) {
    return;
for (K key : keys) {
    if (key == null) {
...
Vremove(Map map, K key)
Removes the mapping for a key from this map if it is present. 
if (map == null)
    return null;
return map.remove(key);
voidremoveAll(final Map target, final Iterable keys, Collection values)
Removes all the given keys from the given map and adds their corresponding values to the given collection. 
if (keys != null) {
    removeAll(target, keys.iterator(), values);
voidremoveAll(Map map, Set keys)
remove All 
for (K k : keys) {
    map.remove(k);
booleanremoveAllFromCollection(Map> map, Object key, Collection values)
remove All From Collection 
Collection list = (Collection) map.get(key);
if (list == null) {
    return false;
} else {
    boolean result = list.removeAll(values);
    if (list.isEmpty()) {
        map.remove(key);
    return result;
MapremoveAllNullValueEntry(Map source)
remove All Null Value Entry 
if (null == source) {
    return new HashMap<R, T>();
Map<R, T> map = new HashMap<R, T>();
for (Entry<R, T> entry : source.entrySet()) {
    if (null == entry.getValue() || null == entry.getKey()) {
        continue;
    map.put(entry.getKey(), entry.getValue());
return map;
booleanremoveAndCleanFromCollectionMap(KeyT key, ValT toBeRemoved, Map> map)
NOTE Same as removeObjectFromCollectionMap but remove key if Collection is empty. 
Collection<ValT> obj = map.get(key);
if (obj == null) {
    return false;
Collection<ValT> coll = obj;
final boolean ret = coll.remove(toBeRemoved);
if (coll.isEmpty()) {
    map.remove(key);
...
voidremoveApiUuidMap(String apiName)
remove Api Uuid Map 
apiUuidMap.remove(apiName);