Example usage for java.util Map containsKey

Introduction

In this page you can find the example usage for java.util Map containsKey.

Prototype

boolean containsKey(Object key);

Source Link

Document

Returns true if this map contains a mapping for the specified key.

Usage

From source file:Main.java

public static boolean containsAll(Map map, List keys) {
    for (Object key : keys) {
        if (!map.containsKey(key)) {
            return false;
        }/* w  ww . j av  a 2  s.co m*/
    }
    return true;
}

From source file:Main.java

/**
 * This method allows you to add a value to a list that is contained
 * in a map. If the key is not already in the map it is create and a
 * new (@link ArrayList} is started.  //from  w  ww  .  j ava  2  s .  c om
 * @param mapArrayList
 * @param key
 * @param value
 */
public static <K, V> void addToMappedArrayList(Map<K, List<V>> mapArrayList, K key, V value) {

    if (!mapArrayList.containsKey(key)) {
        mapArrayList.put(key, new ArrayList<V>());
    }

    mapArrayList.get(key).add(value);

}

From source file:Main.java

final static public boolean containsKey(Map<Object, Object> collection, Object item) {
    return collection != null && collection.containsKey(item);
}

From source file:Main.java

public static <T> List<T> unwrap(Map<String, List<T>> response, String key) {
    if (response != null && response.containsKey(key) && response.get(key) != null) {
        return response.get(key);
    } else {//from   ww  w  . ja va 2s .c om
        return new ArrayList<>();
    }
}

From source file:Main.java

public static <T> List<T> unwrapResponse(Map<String, List<T>> response, String key) {
    if (response != null && response.containsKey(key) && response.get(key) != null) {
        return response.get(key);
    } else {//from   w w w.ja  v a2  s.co m
        return new ArrayList<>();
    }
}

From source file:Main.java

public static String mapGetValueIgnoringCase(java.util.Map<String, String> map, String key) {
    if (map.containsKey(key)) {
        return map.get(key);
    }/*w w w.  ja  va  2  s . co  m*/
    for (String f : map.keySet()) {
        if (equalsIgnoreCase(f, key)) {
            return map.get(f);
        }
    }
    return null;
}

From source file:Main.java

public static boolean mapContainsKeyIgnoringCase(Map<String, String> map, String key) {
    if (map.containsKey(key)) {
        return true;
    }//from  w w  w .  j  a  v  a2s.co  m
    return collectionContainsIgnoringCase(map.keySet(), key);
}

From source file:Main.java

public static final boolean containsKey(Object key) {
    Map<Object, Object> cache = LOCAL_CACHE.get();
    return cache != null && cache.containsKey(key);
}

From source file:Main.java

public static String getPrefix(final String namespace, final Map<String, String> namespacesPrefixesMap) {

    if (!namespacesPrefixesMap.containsKey(namespace)) {

        namespacesPrefixesMap.put(namespace, NAMESPACE_PREFIX_BASE + counter.incrementAndGet());
    }//from  w ww  .ja  va 2 s.  c  o  m

    return namespacesPrefixesMap.get(namespace);
}

From source file:Main.java

public static <K> void aggregateMaps(Map<K, Integer> A, Map<K, Integer> B) {
    for (K k : B.keySet()) {
        if (A.containsKey(k))
            A.put(k, A.get(k) + B.get(k));
        else/*from   www.j  a v  a  2s  .c o  m*/
            A.put(k, B.get(k));
    }
}