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POWhat is an efficient way to compare JTrees?
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copied!<p>I back up my data to an external drive quite often and have to sift through files I have and haven't already transferred over. I thought it would be useful to create a tool that will allow me to select two directories, compare them, and then transfer the files over with a few clicks of a button.</p> <p>I'm sure projects of this sort already exist out there, so for me, it is mainly a learning experience. </p> <p>So to start it off, I have a method that will get all my folders and files so that I can populate my tree:</p> <pre><code>public static void listAllFiles(String directory, DefaultMutableTreeNode parent, Boolean recursive) { File [] children = new File(directory).listFiles(); for (int i = 0; i < children.length; i++) { DefaultMutableTreeNode node = new DefaultMutableTreeNode(children[i].getName()); if (children[i].isDirectory() && recursive) { parent.add(node); listAllFiles(children[i].getPath(), node, recursive); } else if (!children[i].isDirectory()){ parent.add(node); } } } </code></pre> <p>Once the method is called, I simply create my JTree and add it to my view:</p> <pre><code>myTree = new JTree(parent); jScrollPane1.setViewportView(myTree); </code></pre> <p>So once I have my two JTrees, how would I compare the nodes to see what files don't exist on my external? Would it be easier to just compare the array of files?</p> <p><strong>Edit</strong></p> <p>By efficient, I mean is least likely to bog down the computer in case the file tree consists of thousands of files.</p>

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