create Concurrent Hash Map - Java Collection Framework

Java examples for Collection Framework:Map

  1. HOME
  2. Java
  3. Collection Framework
  4. Map

Description

create Concurrent Hash Map

Demo Code


//package com.java2s;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;

public class Main {
    public static final double FACTOR = 0.75;
    public static final int MIN_CAPACITY = 16;

    public static <K, V> Map<K, V> createConcurrentHashMap(int size) {
        return new ConcurrentHashMap<>(getSize(size));
    }// w  ww.  j a  v  a  2s .  c o  m

    public static int getSize(int size) {
        return getSize(size, true);
    }

    public static int getSize(int size, boolean useMinimum) {
        int s = (int) (size / FACTOR) + 1;

        if (useMinimum) {
            s = Math.max(MIN_CAPACITY, s);
        }
        return s;
    }
}

Related Tutorials