Simple Queue (FIFO) based on LinkedList : Queue « Collections Data Structure « Java

Home
Java
1.2D Graphics GUI
2.3D
3.Advanced Graphics
4.Ant
5.Apache Common
6.Chart
7.Class
8.Collections Data Structure
9.Data Type
10.Database SQL JDBC
11.Design Pattern
12.Development Class
13.EJB3
14.Email
15.Event
16.File Input Output
17.Game
18.Generics
19.GWT
20.Hibernate
21.I18N
22.J2EE
23.J2ME
24.JavaFX
25.JDK 6
26.JDK 7
27.JNDI LDAP
28.JPA
29.JSP
30.JSTL
31.Language Basics
32.Network Protocol
33.PDF RTF
34.Reflection
35.Regular Expressions
36.Scripting
37.Security
38.Servlets
39.Spring
40.Swing Components
41.Swing JFC
42.SWT JFace Eclipse
43.Threads
44.Tiny Application
45.Velocity
46.Web Services SOA
47.XML
Java » Collections Data Structure » Queue 




Simple Queue (FIFO) based on LinkedList
    
// Copyright (c) 2003-2009, Jodd Team (jodd.org). All Rights Reserved.


import java.util.LinkedList;

/**
 * Simple Queue (FIFO) based on LinkedList.
 */
public class SimpleQueue<E> {

  private LinkedList<E> list = new LinkedList<E>();

  /**
   * Puts object in queue.
   */
  public void put(E o) {
    list.addLast(o);
  }

  /**
   * Returns an element (object) from queue.
   *
   @return element from queue or <code>null</code> if queue is empty
   */
  public E get() {
    if (list.isEmpty()) {
      return null;
    }
    return list.removeFirst();
  }

  /**
   * Returns all elements from the queue and clears it.
   */
  public Object[] getAll() {
    Object[] res = new Object[list.size()];
    for (int i = 0; i < res.length; i++) {
      res[i= list.get(i);
    }
    list.clear();
    return res;
  }


  /**
   * Peeks an element in the queue. Returned elements is not removed from the queue.
   */
  public E peek() {
    return list.getFirst();
  }

  /**
   * Returns <code>true</code> if queue is empty, otherwise <code>false</code>
   */
  public boolean isEmpty() {
    return list.isEmpty();
  }

  /**
   * Returns queue size.
   */
  public int size() {
    return list.size();
  }
}

   
    
    
    
  














Related examples in the same category
1.Priority queuePriority queue
2.Queue data structureQueue data structure
3.Convert a Queue to a List
4.Create a queue using LinkedList class
5.The Generic Queue Class
6.Blocking Queue
7.Circular Queue
8.Circular Queue extends AbstractList
9.How to extend the collections framework
10.An unbounded {@link TransferQueue} based on linked nodes.
11.This class implements the data structures necessary for an ArrayQueue
12.A circular queue from mina
13.An unbounded TransferQueue based on linked nodes.
14.Rotating queue of fixed size.
15.Allows threads to communicate asynchronously by putting messages into and reading messages out of a synchronized queue.
java2s.com  | Contact Us | Privacy Policy
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.