--- old/src/share/classes/javax/swing/tree/TreeNode.java
          +++ new/src/share/classes/javax/swing/tree/TreeNode.java

   1    1  /*
   2    2   * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
   3    3   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4    4   *
   5    5   * This code is free software; you can redistribute it and/or modify it
   6    6   * under the terms of the GNU General Public License version 2 only, as
   7    7   * published by the Free Software Foundation.  Oracle designates this
   8    8   * particular file as subject to the "Classpath" exception as provided
   9    9   * by Oracle in the LICENSE file that accompanied this code.
  10   10   *
  11   11   * This code is distributed in the hope that it will be useful, but WITHOUT
  12   12   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13   13   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14   14   * version 2 for more details (a copy is included in the LICENSE file that
  15   15   * accompanied this code).
  16   16   *
  17   17   * You should have received a copy of the GNU General Public License version
  18   18   * 2 along with this work; if not, write to the Free Software Foundation,
  19   19   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20   20   *
  21   21   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22   22   * or visit www.oracle.com if you need additional information or have any
  23   23   * questions.
  24   24   */
  25   25  
  26   26  package javax.swing.tree;
  27   27  
  28   28  import java.util.Enumeration;
  29   29  

  30   30  /**
  31   31   * Defines the requirements for an object that can be used as a
  32   32   * tree node in a JTree.
  33   33   * <p>
  34   34   * Implementations of <code>TreeNode</code> that override <code>equals</code>
  35   35   * will typically need to override <code>hashCode</code> as well.  Refer
  36   36   * to {@link javax.swing.tree.TreeModel} for more information.
  37   37   *
  38   38   * For further information and examples of using tree nodes,
  39   39   * see <a
  40      - href="http://docs.oracle.com/javase/tutorial/uiswing/components/tree.html">How to Use Tree Nodes</a>
       40 + href="https://docs.oracle.com/javase/tutorial/uiswing/components/tree.html">How to Use Tree Nodes</a>
  41   41   * in <em>The Java Tutorial.</em>
  42   42   *
  43   43   * @author Rob Davis
  44   44   * @author Scott Violet
  45   45   */
  46   46  
  47   47  public interface TreeNode
  48   48  {
  49   49      /**
  50   50       * Returns the child <code>TreeNode</code> at index

  51   51       * <code>childIndex</code>.
  52   52       */
  53   53      TreeNode getChildAt(int childIndex);
  54   54  
  55   55      /**
  56   56       * Returns the number of children <code>TreeNode</code>s the receiver
  57   57       * contains.
  58   58       */
  59   59      int getChildCount();
  60   60  
  61   61      /**
  62   62       * Returns the parent <code>TreeNode</code> of the receiver.
  63   63       */
  64   64      TreeNode getParent();
  65   65  
  66   66      /**
  67   67       * Returns the index of <code>node</code> in the receivers children.
  68   68       * If the receiver does not contain <code>node</code>, -1 will be
  69   69       * returned.
  70   70       */
  71   71      int getIndex(TreeNode node);
  72   72  
  73   73      /**
  74   74       * Returns true if the receiver allows children.
  75   75       */
  76   76      boolean getAllowsChildren();
  77   77  
  78   78      /**
  79   79       * Returns true if the receiver is a leaf.
  80   80       */
  81   81      boolean isLeaf();
  82   82  
  83   83      /**
  84   84       * Returns the children of the receiver as an <code>Enumeration</code>.
  85   85       */
  86   86      Enumeration children();
  87   87  }

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