Best books about JAVA programming:

• Head First JAVA, Second Editon
• Effective Java Programming Language Guide
• Professional Java, JDK 5 Edition
• Ivor Horton's Beginning Java 2, JDK 5 Edition

JAVA JTree Wide Editor

The following code adds editor on JTree node. This example has two files: WideEditorTreeExample.java and WideCellEditor.java

//Example modified from http://www.crionics.com/products/opensource/faq/swing_ex/JTableExamples2.html
//
/**
* @version 1.0 12/03/98
*/
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;

public class WideEditorTreeExample extends JFrame {
public WideEditorTreeExample() {
super("Wide Editor JTree Example");
String[] strs = { "swing", // 0
"platform", // 1
"basic", // 2
"metal", // 3
"JTree"}; // 4
DefaultMutableTreeNode[] nodes = new DefaultMutableTreeNode[strs.length];
for (int i=0;i<strs.length;i++)
nodes[i] = new DefaultMutableTreeNode(strs[i]);
nodes[0].add(nodes[1]);
nodes[1].add(nodes[2]);
nodes[1].add(nodes[3]);
nodes[0].add(nodes[4]);
JTree tree = new JTree( nodes[0] );
tree.setEditable(true);

tree.setCellEditor(new WideCellEditor(tree,
(DefaultTreeCellRenderer)tree.getCellRenderer()));

JScrollPane sp = new JScrollPane(tree);
getContentPane().add(sp, BorderLayout.CENTER);
}

public static void main(String args[]) {
WideEditorTreeExample frame = new WideEditorTreeExample();
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
});
frame.setSize(300, 150);
frame.setVisible(true);
}
}