Example usage for java.util.concurrent ConcurrentHashMap ConcurrentHashMap

Introduction

In this page you can find the example usage for java.util.concurrent ConcurrentHashMap ConcurrentHashMap.

Prototype

public ConcurrentHashMap(int initialCapacity, float loadFactor) 

Source Link

Document

Creates a new, empty map with an initial table size based on the given number of elements ( initialCapacity ) and initial table density ( loadFactor ).

Usage

From source file:Main.java

public static <K, V> ConcurrentMap<K, V> createConcurrentMap(int initialCapacity, float loadFactor) {
    return new ConcurrentHashMap<K, V>(initialCapacity, loadFactor);
}

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From source file:Main.java

/**
 * Create a properly sized {@link ConcurrentHashMap} based on the given expected number of elements and an
 * explicit load factor//from w w w.  j a v a 2s. c  om
 *
 * @param expectedNumberOfElements The expected number of elements for the created map
 * @param loadFactor The collection load factor
 * @param <K> The map key type
 * @param <V> The map value type
 *
 * @return The created map.
 */
public static <K, V> ConcurrentHashMap<K, V> concurrentMap(int expectedNumberOfElements, float loadFactor) {
    final int size = expectedNumberOfElements + 1 + (int) (expectedNumberOfElements * loadFactor);
    return new ConcurrentHashMap<K, V>(size, loadFactor);
}

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