下面的代码演示了如何从JTree组件中删除节点。
package org.nhooo.example.swing; import javax.swing.*; import javax.swing.tree.*; import java.awt.*; import java.awt.event.ActionListener; import java.awt.event.ActionEvent; public class JTreeRemoveNode extends JFrame { public JTreeRemoveNode() throws HeadlessException { initializeUI(); } private void initializeUI() { setSize(400, 400); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); DefaultMutableTreeNode root = new DefaultMutableTreeNode("Address Book"); String[] names = new String[] {"Alice", "Bob", "Carol", "Mallory"}; for (String name : names) { DefaultMutableTreeNode node = new DefaultMutableTreeNode(name); root.add(node); } final JTree tree = new JTree(root); JScrollPane pane = new JScrollPane(tree); pane.setPreferredSize(new Dimension(400, 400)); JButton removeButton = new JButton("Remove"); removeButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { DefaultTreeModel model = (DefaultTreeModel) tree.getModel(); TreePath[] paths = tree.getSelectionPaths(); if (paths != null) { for (TreePath path : paths) { DefaultMutableTreeNode node = (DefaultMutableTreeNode) path.getLastPathComponent(); if (node.getParent() != null) { model.removeNodeFromParent(node); } } } } }); getContentPane().setLayout(new BorderLayout()); getContentPane().add(tree, BorderLayout.CENTER); getContentPane().add(removeButton, BorderLayout.SOUTH); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable() { public void run() { new JTreeRemoveNode().setVisible(true); } }); } }