Mega Code Archive
File System Tree
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import java.io.File;
import java.util.Iterator;
import java.util.Vector;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JSplitPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.event.TreeModelEvent;
import javax.swing.event.TreeModelListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
public class FileTreeFrame extends JFrame {
private JTree fileTree;
private FileSystemModel fileSystemModel;
private JTextArea fileDetailsTextArea = new JTextArea();
public FileTreeFrame(String directory) {
super("JTree FileSystem Viewer");
fileDetailsTextArea.setEditable(false);
fileSystemModel = new FileSystemModel(new File(directory));
fileTree = new JTree(fileSystemModel);
fileTree.setEditable(true);
fileTree.addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent event) {
File file = (File) fileTree.getLastSelectedPathComponent();
fileDetailsTextArea.setText(getFileDetails(file));
}
});
JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, true, new JScrollPane(
fileTree), new JScrollPane(fileDetailsTextArea));
getContentPane().add(splitPane);
setDefaultCloseOperation(EXIT_ON_CLOSE);
setSize(640, 480);
setVisible(true);
}
private String getFileDetails(File file) {
if (file == null)
return "";
StringBuffer buffer = new StringBuffer();
buffer.append("Name: " + file.getName() + "\n");
buffer.append("Path: " + file.getPath() + "\n");
buffer.append("Size: " + file.length() + "\n");
return buffer.toString();
}
public static void main(String args[]) {
new FileTreeFrame("c:\\");
}
}
class FileSystemModel implements TreeModel {
private File root;
private Vector listeners = new Vector();
public FileSystemModel(File rootDirectory) {
root = rootDirectory;
}
public Object getRoot() {
return root;
}
public Object getChild(Object parent, int index) {
File directory = (File) parent;
String[] children = directory.list();
return new TreeFile(directory, children[index]);
}
public int getChildCount(Object parent) {
File file = (File) parent;
if (file.isDirectory()) {
String[] fileList = file.list();
if (fileList != null)
return file.list().length;
}
return 0;
}
public boolean isLeaf(Object node) {
File file = (File) node;
return file.isFile();
}
public int getIndexOfChild(Object parent, Object child) {
File directory = (File) parent;
File file = (File) child;
String[] children = directory.list();
for (int i = 0; i < children.length; i++) {
if (file.getName().equals(children[i])) {
return i;
}
}
return -1;
}
public void valueForPathChanged(TreePath path, Object value) {
File oldFile = (File) path.getLastPathComponent();
String fileParentPath = oldFile.getParent();
String newFileName = (String) value;
File targetFile = new File(fileParentPath, newFileName);
oldFile.renameTo(targetFile);
File parent = new File(fileParentPath);
int[] changedChildrenIndices = { getIndexOfChild(parent, targetFile) };
Object[] changedChildren = { targetFile };
fireTreeNodesChanged(path.getParentPath(), changedChildrenIndices, changedChildren);
}
private void fireTreeNodesChanged(TreePath parentPath, int[] indices, Object[] children) {
TreeModelEvent event = new TreeModelEvent(this, parentPath, indices, children);
Iterator iterator = listeners.iterator();
TreeModelListener listener = null;
while (iterator.hasNext()) {
listener = (TreeModelListener) iterator.next();
listener.treeNodesChanged(event);
}
}
public void addTreeModelListener(TreeModelListener listener) {
listeners.add(listener);
}
public void removeTreeModelListener(TreeModelListener listener) {
listeners.remove(listener);
}
private class TreeFile extends File {
public TreeFile(File parent, String child) {
super(parent, child);
}
public String toString() {
return getName();
}
}
}
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