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import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class Main extends JFrame {
DefaultMutableTreeNode rootNode = new DefaultMutableTreeNode("J");
DefaultTreeModel model = new DefaultTreeModel(rootNode);
JTree m_tree = new JTree(model);
JButton addButton;
public Main() {
DefaultMutableTreeNode forums = new DefaultMutableTreeNode("F");
forums.add(new DefaultMutableTreeNode("T"));
DefaultMutableTreeNode articles = new DefaultMutableTreeNode("A");
articles.add(new DefaultMutableTreeNode("1"));
DefaultMutableTreeNode examples = new DefaultMutableTreeNode("E");
examples.add(new DefaultMutableTreeNode("2"));
rootNode.add(forums);
rootNode.add(articles);
rootNode.add(examples);
m_tree.setEditable(true);
m_tree.setSelectionRow(0);
JScrollPane scrollPane = new JScrollPane(m_tree);
getContentPane().add(scrollPane, BorderLayout.CENTER);
JPanel panel = new JPanel();
addButton = new JButton("Add Node");
addButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
DefaultMutableTreeNode selNode = (DefaultMutableTreeNode) m_tree
.getLastSelectedPathComponent();
if (selNode != null) {
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode("New Node");
model.insertNodeInto(newNode, selNode, selNode.getChildCount());
TreeNode[] nodes = model.getPathToRoot(newNode);
TreePath path = new TreePath(nodes);
m_tree.scrollPathToVisible(path);
m_tree.setSelectionPath(path);
m_tree.startEditingAtPath(path);
}
}
});
panel.add(addButton);
getContentPane().add(panel, BorderLayout.SOUTH);
setSize(300, 400);
setVisible(true);
}
public static void main(String[] arg) {
new Main();
}
}
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