UsingTreeSelectionListener.java Source code

Introduction

Here is the source code for UsingTreeSelectionListener.java

Source

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeSelectionModel;

public class UsingTreeSelectionListener {

    public static void main(String[] a) {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JTree tree = new JTree();
        tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
        tree.addTreeSelectionListener(new SelectionListener());

        frame.add(new JScrollPane(tree));

        frame.setSize(300, 200);
        frame.setVisible(true);
    }

}

class SelectionListener implements TreeSelectionListener {

    public void valueChanged(TreeSelectionEvent se) {
        JTree tree = (JTree) se.getSource();
        DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
        String selectedNodeName = selectedNode.toString();
        if (selectedNode.isLeaf()) {

            System.out.println(selectedNodeName);

        }
    }
}