JTree node mouse click event : JTree Node « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. JTree Node

import java.awt.BorderLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.JTree;
import javax.swing.ScrollPaneConstants;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreePath;

public class MainClass {

  public static void main(String[] a) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.add(new JTreeEvents());
    f.setSize(500, 500);
    f.setVisible(true);
  }
}

class JTreeEvents extends JPanel {
  JTree tree;

  JTextField jtf;

  public JTreeEvents() {
    setLayout(new BorderLayout());
    DefaultMutableTreeNode top = new DefaultMutableTreeNode("Options");

    DefaultMutableTreeNode a = new DefaultMutableTreeNode("A");
    top.add(a);
    
    a.add(new DefaultMutableTreeNode("A1"));
    a.add(new DefaultMutableTreeNode("A2"));

    DefaultMutableTreeNode b = new DefaultMutableTreeNode("B");
    top.add(b);
    
    b.add(new DefaultMutableTreeNode("B1"));
    b.add(new DefaultMutableTreeNode("B2"));
    b.add(new DefaultMutableTreeNode("B3"));

    tree = new JTree(top);

    int v = ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
    int h = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
    JScrollPane jsp = new JScrollPane(tree, v, h);

    add(jsp, BorderLayout.CENTER);

    jtf = new JTextField("", 20);
    add(jtf, BorderLayout.SOUTH);

    tree.addMouseListener(new MouseAdapter() {
      public void mouseClicked(MouseEvent me) {
        doMouseClicked(me);
      }
    });
  }

  void doMouseClicked(MouseEvent me) {
    TreePath tp = tree.getPathForLocation(me.getX(), me.getY());
    if (tp != null)
      jtf.setText(tp.toString());
    else
      jtf.setText("");
  }
}

14.67.JTree Node
	14.67.1.	Get child count, depth, leaf count
	14.67.2.	Adding a Node to a JTree Component
	14.67.3.	Delete tree node
	14.67.4.	Removing a Node to a JTree Component
	14.67.5.	Expression Tree
	14.67.6.	Swing Tree
	14.67.7.	JTree node mouse click event
	14.67.8.	A JTree subclass that displays the tree of AWT or Swing component that make up a GUI
	14.67.9.	Tree with custom icon
	14.67.10.	CheckBox Tree node
	14.67.11.	Get path for all expanded or not expanded tree pathes
	14.67.12.	Converting All Nodes in a JTree Component to a TreePath Array
	14.67.13.	Expanding or Collapsing All Nodes in a JTree Component
	14.67.14.	JTree root cannot be removed with removeNodeFromParent(), use DefaultTreeModel.setRoot() to remove the root
	14.67.15.	Searching node in a JTree