Collections

Get Synchronized List from ArrayList example

This is an example of how to get a synchronized List from an ArrayList. The Collections class provides us with synchronizedList(List list) API method, that returns a synchronized (thread-safe) list from the provided ArrayList. Getting a synchronized List from an ArrayList implies that you should:

  • Create an ArrayList.
  • Populate the arrayList with elements, with add(E e) API method of ArrayList.
  • Invoke the synchronizedList(List list) API method of Collections to get the synchronized list from the provided ArrayList.

Let’s take a look at the code snippet that follows:

package com.javacodegeeks.snippets.core;
 
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
 
public class SynchronizedArrayList {
 
  public static void main(String[] args) {

    // Create an ArrayList and populate it with elements
    ArrayList arrayList = new ArrayList();
    arrayList.add("element_1");
    arrayList.add("element_2");
    arrayList.add("element_3");
 
    // static void synchronizedList(List list) method returns a synchronized list from the provided ArrayList
    List syncList = Collections.synchronizedList(arrayList);

    System.out.println("syncList conatins : " + syncList);
 
  }
}

Output:

syncList conatins : [element_1, element_2, element_3]

 
This was an example of how to get a synchronized List from an ArrayList in Java.

Byron Kiourtzoglou

Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.
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