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Vaadin is a web application framework for Rich Internet Applications (RIA). Vaadin enables easy development and maintenance of fast and secure rich web applications with a stunning look and feel and a wide browser support. It features a server-side architecture with the majority of the logic running on the server. Ajax technology is used at the browser-side to ensure a rich and interactive user experience.

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/*
 * Copyright 2007 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package java.util;

/**
 * Hash table and linked-list implementation of the Set interface with
 * predictable iteration order. [Sun
 * docs]
 * 
 * @param  element type.
 */
public class LinkedHashSet extends HashSet implements Set, Cloneable {

  public LinkedHashSet() {
    super(new LinkedHashMap());
  }

  public LinkedHashSet(Collection c) {
    super(new LinkedHashMap());
    addAll(c);
  }

  public LinkedHashSet(int ignored) {
    super(new LinkedHashMap(ignored));
  }

  public LinkedHashSet(int ignored, float alsoIgnored) {
    super(new LinkedHashMap(ignored, alsoIgnored));
  }

  @Override
  public Object clone() {
    return new LinkedHashSet(this);
  }

}