Example usage for java.util Collections synchronizedMap

Introduction

In this page you can find the example usage for java.util Collections synchronizedMap.

Prototype

public static <K, V> Map<K, V> synchronizedMap(Map<K, V> m)

Source Link

Document

Returns a synchronized (thread-safe) map backed by the specified map.

Usage

From source file:Main.java

public static void main(String[] args) {
    HashMap hashMap = new HashMap();
    Map map = Collections.synchronizedMap(hashMap);
}

From source file:Main.java

public static void main(String[] args) {
    TreeMap treeMap = new TreeMap();
    Map map = Collections.synchronizedMap(treeMap);
}

From source file:Main.java

public static void main(String[] args) {
    // create map
    Map<String, String> map = new HashMap<String, String>();

    // populate the map
    map.put("1", "A");
    map.put("2", "B");
    map.put("3", "java2s.com");

    // create a synchronized map
    Map<String, String> synmap = Collections.synchronizedMap(map);

    System.out.println("Synchronized map is :" + synmap);
}

From source file:Main.java

public static void main(String[] args) {
    Collection<String> c = Collections.synchronizedCollection(new ArrayList<String>());
    List<String> list = Collections.synchronizedList(new ArrayList<String>());
    Set<String> s = Collections.synchronizedSet(new HashSet<String>());
    Map<String, String> m = Collections.synchronizedMap(new HashMap<String, String>());
}

From source file:Main.java

public static void main(String[] argv) throws Exception {
    final int MAX_ENTRIES = 100;
    Map cache = new LinkedHashMap(MAX_ENTRIES + 1, .75F, true) {
        public boolean removeEldestEntry(Map.Entry eldest) {
            return size() > MAX_ENTRIES;
        }/*w  w w  .j  a  v a  2 s . c o  m*/
    };

    Object key = "key";
    Object value = "value";
    cache.put(key, value);
    Object o = cache.get(key);
    if (o == null && !cache.containsKey(key)) {
    }
    cache = (Map) Collections.synchronizedMap(cache);
}

From source file:MainClass.java

public static void main(String args[]) {
    Set simpsons = new HashSet();
    simpsons.add("B");
    simpsons.add("H");
    simpsons.add("L");
    simpsons = Collections.synchronizedSet(simpsons);
    synchronized (simpsons) {
        Iterator iter = simpsons.iterator();
        while (iter.hasNext()) {
            System.out.println(iter.next());
        }//w  w w .j  a va 2 s .  co  m
    }
    Map map = Collections.synchronizedMap(new HashMap(89));
    Set set = map.entrySet();
    synchronized (map) {
        Iterator iter = set.iterator();
        while (iter.hasNext()) {
            System.out.println(iter.next());
        }
    }
}

From source file:Synchronization.java

public static void main(String[] args) {
    Collection c = Collections.synchronizedCollection(new ArrayList());
    List list = Collections.synchronizedList(new ArrayList());
    Set s = Collections.synchronizedSet(new HashSet());
    Map m = Collections.synchronizedMap(new HashMap());
}

From source file:SyncTest.java

public static void main(String args[]) {
    Set simpsons = new HashSet();
    simpsons.add("Bart");
    simpsons.add("Hugo");
    simpsons.add("Lisa");
    simpsons.add("Marge");
    simpsons.add("Homer");
    simpsons.add("Maggie");
    simpsons.add("Roy");
    simpsons = Collections.synchronizedSet(simpsons);
    synchronized (simpsons) {
        Iterator iter = simpsons.iterator();
        while (iter.hasNext()) {
            System.out.println(iter.next());
        }/* w ww  .  j  a v  a2 s.c  o  m*/
    }
    Map map = Collections.synchronizedMap(new HashMap(89));
    Set set = map.entrySet();
    synchronized (map) {
        Iterator iter = set.iterator();
        while (iter.hasNext()) {
            System.out.println(iter.next());
        }
    }
}

From source file:at.ac.tuwien.infosys.logger.ProvisioningLogger.java

public static void main(String[] args) {
    Map<String, Log> deviceLogs = Collections.synchronizedMap(new HashMap<String, Log>());

    System.out.println(deviceLogs.values().contains(null));

    deviceLogs.put("id1", null);

    System.out.println(deviceLogs.values().contains(null));
}

From source file:Main.java

public static <K, V> HashMap<K, V> synchronizedMap() {
    return (HashMap<K, V>) Collections.synchronizedMap(new HashMap<K, V>());
}