Example usage for java.util Map keySet

Introduction

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

Prototype

Set<K> keySet();

Source Link

Document

Returns a Set view of the keys contained in this map.

Usage

From source file:Main.java

public static Object get(Class c, Map map) {
    if (map.keySet().contains(c)) {
        return map.get(c);
    }/*from www .ja  v a2  s. c  om*/
    for (Iterator i = map.keySet().iterator(); i.hasNext();) {
        Class candidateClass = (Class) i.next();
        if (candidateClass.isAssignableFrom(c)) {
            return map.get(candidateClass);
        }
    }

    return null;
}

From source file:Main.java

private static boolean isList(Map temp) {
    Set s = new TreeSet(temp.keySet());
    Object[] keyArray = s.toArray(new Object[] {});
    for (int i = 0; i < keyArray.length; i++) {
        if (keyArray[i] instanceof Number) {
            if (((Number) keyArray[i]).intValue() != i) {
                return false;
            }//  w w w.j  a  v a  2  s.c  o  m
        } else {
            return false;
        }
    }
    return true;
}

From source file:Main.java

public static <T> void addAllKeys(Collection<T> c, Map<T, ?> map) {
    c.addAll(map.keySet());
}

From source file:Main.java

/** Merge two map counters. */
public static <K> void mergeMapCounters(Map<K, Integer> counter1, Map<K, Integer> counter2) {
    for (K key : counter2.keySet()) {
        increaseMapCounter(counter1, key, counter2.get(key));
    }//from   ww w  .  j a v  a2s .c  o m
}

From source file:Main.java

public static <Key> void removeFromMapThatKeyNotExistInList(Map<Key, ?> map, List<Key> list) {
    Object[] keys = map.keySet().toArray();
    for (Object key : keys) {
        if (!list.contains(key)) {
            map.remove(key);/*from  w  w  w .  j  av a  2s. com*/
        }
    }
}

From source file:Main.java

private static String getStrInMapIgnoreCase(String key, Map<String, Object> map) {
    Set<String> keySet = map.keySet();
    for (String keyInMap : keySet) {
        if (key.equalsIgnoreCase(keyInMap)) {
            return keyInMap;
        }//from ww  w  .j  ava 2  s.  c  o m
    }
    return null;
}

From source file:Main.java

public static String assignDynamicValues(String inputXML, Map<String, String> dynamicValues) {
    for (String key : dynamicValues.keySet()) {
        if (inputXML.contains("{" + key + "}")) {
            inputXML = inputXML.replaceAll("\\{" + key + "\\}", dynamicValues.get(key));
        }//  www  .  j ava 2 s . c om
    }
    return inputXML;
}

From source file:Main.java

public static boolean isEmpty(Map<?, ?> map) {
    return map == null || map.keySet().isEmpty();
}

From source file:Main.java

public static void reverse(Map source, Map target) {
    for (Iterator it = source.keySet().iterator(); it.hasNext();) {
        Object key = it.next();/*from  w  ww  .  j  a va 2  s .  com*/
        target.put(source.get(key), key);
    }
}

From source file:Main.java

/**
 * Normalize  all values so the sum is 1
 * @param <K>/*from   w  ww. j av  a 2  s .c  o  m*/
 * @param map 
 */
public static <K> void normalizeMap(Map<K, Double> map) {
    Set<K> keys = map.keySet();
    double sum = 0.0 + map.values().stream().mapToDouble(Double::doubleValue).sum();

    for (K key : keys) {
        map.put(key, map.get(key) / sum);
    }
}