In this example we shall show you how to get a Synchronized Set. We are using a HashSet, but the same API applies to any type of Set implementation. The Collections API provides us with methods so as to get synchronized (thread-safe) Collections from specific Collections. To get a synchronized Set one should perform the following steps:
- Create a new HashSet.
- Populate the new set with elements, using the
add(E e)API method of the Set. - Invoke the
synchronizedSet(SetAPI method of Collections in order to return a synchronized (thread-safe) set backed by the specified set,s)
as described in the code snippet below.
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | package com.javacodegeeks.snippets.core; import java.util.Collections;import java.util.HashSet;import java.util.Set; public class SynchronizedSetExample { public static void main(String[] args) { /*Please note that the same API applies to any type of Set implementation class e.g. TreeSet etc */ // Create a HashSet and populate it with elements HashSet hashSet = new HashSet(); hashSet.add("element_1"); hashSet.add("element_2"); hashSet.add("element_3"); // static void synchronizedSet(Set set) method returns a synchronized Set from HashSet Set syncSet = Collections.synchronizedSet(hashSet); System.out.println("syncSet contains : " + syncSet); }} |
Output:
syncSet contains : [element_1, element_2, element_3]
This was an example of how to get a Synchronized Set in Java.
