Example usage for java.util Map get

Introduction

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

Prototype

V get(Object key);

Source Link

Document

Returns the value to which the specified key is mapped, or null if this map contains no mapping for the key.

Usage

From source file:Main.java

public static void add(Map<String, Integer> statMap, String key) {
    Integer counter = statMap.get(key);
    if (counter == null) {
        statMap.put(key, Integer.valueOf(1));
    } else {/*w w w  .  j  av  a  2s.  c  o m*/
        statMap.put(key, Integer.valueOf(counter.intValue() + 1));
    }
}

From source file:Main.java

/**
 * Utility method that returns the named boolean value form the given map.
 *
 * @param properties map of properties (String -> Object)
 * @param name       property name/*from   w  w w.ja va  2s .c  o  m*/
 * @return property value, or false
 */
private static boolean getBoolean(Map<String, Object> properties, String name) {
    Object value = properties.get(name);
    if (value instanceof Boolean) {
        return ((Boolean) value).booleanValue();
    }
    return false;
}

From source file:Main.java

public static List<Map<String, Object>> setFirstMapFromList(List<Map<String, Object>> list, String field,
        String value) {/*  w  w w.j a  v  a  2s  . c o  m*/

    List<Map<String, Object>> collection = new ArrayList<Map<String, Object>>();
    for (Iterator<Map<String, Object>> iter = list.iterator(); iter.hasNext();) {

        Map<String, Object> map = iter.next();
        String deField = map.get(field).toString();
        if (deField.equalsIgnoreCase(value)) {
            collection.add(map);
            collection.addAll(list);

            list.clear();
            list.addAll(collection);
            break;
        }
    }
    return list;
}

From source file:Main.java

public static String getValue(String key, String defaultKey, Map<String, String> map) {
    String value = map.get(key);
    if (value == null)
        value = map.get(defaultKey);/* ww  w. ja v  a2 s . c  om*/
    return value;
}

From source file:Main.java

/**
 * Utility method that returns the named short value form the given map.
 *
 * @param properties map of named properties (String -> Object)
 * @param name       property name/*from   w  ww  .j  ava2  s .c  o  m*/
 * @return property value, or zero
 */
private static short getShort(Map<String, Object> properties, String name) {
    Object value = properties.get(name);
    if (value instanceof Short) {
        return ((Short) value).shortValue();
    }
    return 0;
}

From source file:Main.java

public static <K, V> void add(Map<K, List<V>> map, K key, V value) {
    if (map.containsKey(key)) {
        map.get(key).add(value);
    } else {/*  w w  w. jav  a  2 s .  co m*/
        List<V> list = new ArrayList<>();
        list.add(value);
        map.put(key, list);
    }
}

From source file:dmh.kuebiko.model.DaoParameter.java

/**
 * Retrieve a string parameter value from a parameter map.
 * @param paramMap The map containing the desired value.
 * @param paramKey The key of the desired value.
 * @return The requested value, or null if it does not exist.
 *///w  w w.jav a2  s.  c  om
static String getParameter(Map<String, String> paramMap, DaoParameter paramKey) {
    return trimToNull(paramMap.get(paramKey.toString()));
}

From source file:Main.java

public static <K, V> void putOrCreateList(Map<K, List<V>> map, K key, V value) {
    List<V> list;//from  w w w  . ja va  2  s.c  om
    list = map.get(key);
    if (list == null) {
        list = new ArrayList<>();
        list.add(value);
        map.put(key, list);
    } else {
        list.add(value);
    }
}

From source file:Main.java

public static <K, V> V getIfNotNull(final Map<? super K, ? extends V> map, final K key) {
    return (map != null) && (key != null) ? map.get(key) : null;
}

From source file:Main.java

public static Color getColorProperty(Map p, Object key, Color defaultValue) {
    Object value = p.get(key);

    if (value instanceof Color)
        return (Color) value;
    else if (value instanceof String) {
        try {/*from   w w w .  ja  v  a 2s  .  c om*/
            return Color.decode((String) value);
        } catch (NumberFormatException e) {
        }
    }
    return defaultValue;
}