http://www.jexp.ru/index.php?action=history&feed=atom&title=Java_Tutorial%2FSwing%2FJTree_File 2026-04-22T08:19:20Z История изменений этой страницы в вики MediaWiki 1.30.0 http://www.jexp.ru/index.php?title=Java_Tutorial/Swing/JTree_File&diff=3995&oldid=prev 2010-05-31T17:44:27Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <tr style="vertical-align: top;" lang="ru"> <td colspan="1" style="background-color: white; color:black; text-align: center;">← Предыдущая</td> <td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 17:44, 31 мая 2010</td> </tr><tr><td colspan="2" style="text-align: center;" lang="ru"><div class="mw-diff-empty">(нет различий)</div> </td></tr></table>

http://www.jexp.ru/index.php?title=Java_Tutorial/Swing/JTree_File&diff=3996&oldid=prev 2010-05-31T15:34:18Z

<p>1 версия</p> <p><b>Новая страница</b></p><div>== JTree Displaying the File System Hierarchy Using the Custom Tree Model ==<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> &lt;!-- start source code --&gt;<br /> <br /> &lt;source lang=&quot;java&quot;&gt;<br /> import java.io.File;<br /> import java.util.Enumeration;<br /> import java.util.Vector;<br /> import javax.swing.JFrame;<br /> import javax.swing.JScrollPane;<br /> import javax.swing.JTree;<br /> import javax.swing.event.TreeModelEvent;<br /> import javax.swing.event.TreeModelListener;<br /> import javax.swing.tree.TreeModel;<br /> import javax.swing.tree.TreePath;<br /> public class CreatingTreeModel {<br /> public static void main(String[] a) {<br /> JFrame frame = new JFrame();<br /> frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);<br /> FileSystemModel fileSystemDataModel = new FileSystemModel();<br /> JTree tree = new JTree(fileSystemDataModel);<br /> JScrollPane scrollPane = new JScrollPane(tree);<br /> frame.add(scrollPane);<br /> frame.setSize(300, 200);<br /> frame.setVisible(true);<br /> }<br /> }<br /> class FileSystemModel implements TreeModel {<br /> private String root; // The root identifier<br /> private Vector listeners; // Declare the listeners vector<br /> public FileSystemModel() {<br /> root = System.getProperty(&quot;user.home&quot;);<br /> File tempFile = new File(root);<br /> root = tempFile.getParent();<br /> listeners = new Vector();<br /> }<br /> public Object getRoot() {<br /> return (new File(root));<br /> }<br /> public Object getChild(Object parent, int index) {<br /> File directory = (File) parent;<br /> String[] directoryMembers = directory.list();<br /> return (new File(directory, directoryMembers[index]));<br /> }<br /> public int getChildCount(Object parent) {<br /> File fileSystemMember = (File) parent;<br /> if (fileSystemMember.isDirectory()) {<br /> String[] directoryMembers = fileSystemMember.list();<br /> return directoryMembers.length;<br /> }<br /> else {<br /> return 0;<br /> }<br /> }<br /> public int getIndexOfChild(Object parent, Object child) {<br /> File directory = (File) parent;<br /> File directoryMember = (File) child;<br /> String[] directoryMemberNames = directory.list();<br /> int result = -1;<br /> for (int i = 0; i &lt; directoryMemberNames.length; ++i) {<br /> if (directoryMember.getName().equals(directoryMemberNames[i])) {<br /> result = i;<br /> break;<br /> }<br /> }<br /> return result;<br /> }<br /> public boolean isLeaf(Object node) {<br /> return ((File) node).isFile();<br /> }<br /> public void addTreeModelListener(TreeModelListener l) {<br /> if (l != null &amp;&amp; !listeners.contains(l)) {<br /> listeners.addElement(l);<br /> }<br /> }<br /> public void removeTreeModelListener(TreeModelListener l) {<br /> if (l != null) {<br /> listeners.removeElement(l);<br /> }<br /> }<br /> public void valueForPathChanged(TreePath path, Object newValue) {<br /> // Does Nothing!<br /> }<br /> public void fireTreeNodesInserted(TreeModelEvent e) {<br /> Enumeration listenerCount = listeners.elements();<br /> while (listenerCount.hasMoreElements()) {<br /> TreeModelListener listener = (TreeModelListener) listenerCount.nextElement();<br /> listener.treeNodesInserted(e);<br /> }<br /> }<br /> public void fireTreeNodesRemoved(TreeModelEvent e) {<br /> Enumeration listenerCount = listeners.elements();<br /> while (listenerCount.hasMoreElements()) {<br /> TreeModelListener listener = (TreeModelListener) listenerCount.nextElement();<br /> listener.treeNodesRemoved(e);<br /> }<br /> }<br /> public void fireTreeNodesChanged(TreeModelEvent e) {<br /> Enumeration listenerCount = listeners.elements();<br /> while (listenerCount.hasMoreElements()) {<br /> TreeModelListener listener = (TreeModelListener) listenerCount.nextElement();<br /> listener.treeNodesChanged(e);<br /> }<br /> }<br /> public void fireTreeStructureChanged(TreeModelEvent e) {<br /> Enumeration listenerCount = listeners.elements();<br /> while (listenerCount.hasMoreElements()) {<br /> TreeModelListener listener = (TreeModelListener) listenerCount.nextElement();<br /> listener.treeStructureChanged(e);<br /> }<br /> }<br /> }&lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;</div>

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