Home | History | Annotate | Download | only in base 
      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 package org.chromium.base;
      6 
      7 import java.util.ArrayList;
      8 import java.util.Collections;
      9 import java.util.HashSet;
     10 
     11 /**
     12  * Functions used for easier initialization of Java collections. Inspired by
     13  * functionality in com.google.common.collect in Guava but cherry-picked to
     14  * bare-minimum functionality to avoid bloat. (http://crbug.com/272790 provides
     15  * further details)
     16  */
     17 public final class CollectionUtil {
     18     private CollectionUtil() {}
     19 
     20     public static <E> HashSet<E> newHashSet(E... elements) {
     21         HashSet<E> set = new HashSet<E>(elements.length);
     22         Collections.addAll(set, elements);
     23         return set;
     24     }
     25 
     26     public static <E> ArrayList<E> newArrayList(E... elements) {
     27         ArrayList<E> list = new ArrayList<E>(elements.length);
     28         Collections.addAll(list, elements);
     29         return list;
     30     }
     31 
     32     public static <E> ArrayList<E> newArrayList(Iterable<E> iterable) {
     33         ArrayList<E> list = new ArrayList<E>();
     34         for (E element : iterable) {
     35             list.add(element);
     36         }
     37         return list;
     38     }
     39 }