//PROGRAM 13-12
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
import javax.swing.event.*;

class DemoTree implements TreeSelectionListener {	
  public JTree tree;
  public JScrollPane scroller;
  public JTextField tfInfo;
			
  public DemoTree() {	
    DefaultMutableTreeNode root = null;
    DefaultMutableTreeNode nodeLevel1 = null;
    DefaultMutableTreeNode nodeLevel2 = null;
		
    root = new DefaultMutableTreeNode("SDDN");
				
    nodeLevel1 = new DefaultMutableTreeNode("Betha Sidik");
    root.add(nodeLevel1);		
    nodeLevel2 = new DefaultMutableTreeNode("Pemrograman HTML");
    nodeLevel1.add(nodeLevel2);
    nodeLevel2 = new DefaultMutableTreeNode("Pemrograman PHP");
    nodeLevel1.add(nodeLevel2);
    nodeLevel2 = new DefaultMutableTreeNode("Linux/Unix");
    nodeLevel1.add(nodeLevel2);
		
    nodeLevel1 = new DefaultMutableTreeNode("KS Bahri");
    root.add(nodeLevel1);		
    nodeLevel2 = new 
      DefaultMutableTreeNode("Pemrograman Delphi");
    nodeLevel1.add(nodeLevel2);

    nodeLevel1 = new DefaultMutableTreeNode("Ruslan Nuryadin");
    root.add(nodeLevel1);		
    nodeLevel2 = new DefaultMutableTreeNode("Co-Linux");
    nodeLevel1.add(nodeLevel2);
    nodeLevel2 = new DefaultMutableTreeNode("MapServer");
    nodeLevel1.add(nodeLevel2);

    nodeLevel1 = new DefaultMutableTreeNode("Budi Raharjo");
    root.add(nodeLevel1);		
    nodeLevel2 = new DefaultMutableTreeNode("Oracle");
    nodeLevel1.add(nodeLevel2);
    nodeLevel2 = new DefaultMutableTreeNode("C++");
    nodeLevel1.add(nodeLevel2);
    nodeLevel2 = new DefaultMutableTreeNode("Pascal");
    nodeLevel1.add(nodeLevel2);		
    nodeLevel2 = new DefaultMutableTreeNode("Java");
    nodeLevel1.add(nodeLevel2);		
		
    tree = new JTree(root);
    tree.getSelectionModel().setSelectionMode
        (TreeSelectionModel.SINGLE_TREE_SELECTION);
    tree.addTreeSelectionListener(this);
		
    scroller = new JScrollPane(tree,
      ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
      ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    scroller.setLocation(0,0);
    scroller.setSize(new Dimension(440, 300));
		
    tfInfo = new JTextField(100);
    tfInfo.setLocation(0, 300);
    tfInfo.setSize(tfInfo.getPreferredSize());		
  }
		
  public void createAndShowGUI() {
    JFrame.setDefaultLookAndFeelDecorated(true);
    JFrame frame = new JFrame("Demo JTree");
    frame.setLayout(null);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
    frame.getContentPane().add(scroller);
    frame.getContentPane().add(tfInfo);
				
    frame.setBounds(0, 0, 450, 350);
    frame.setLocationRelativeTo(null);

    frame.setVisible(true);
  }
	
  public void valueChanged(TreeSelectionEvent event) {
    DefaultMutableTreeNode node = (DefaultMutableTreeNode)
      tree.getLastSelectedPathComponent();
    if (node == null) {
      return;
    }
		
    //if (node.isLeaf()) { // memeriksa node level akhir
    tfInfo.setText(node.toString());
    //}
  }
			
  public static void main(String[] args) {		
    javax.swing.SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        DemoTree app = new DemoTree();
        app.createAndShowGUI();
      }
    });		
  }	
}