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 multiple line

The following code creates a multiple line node in JTree. This examples needs two files:MultiLineTreeExample.java and MultiLineCellRenderer.java

//Example modified from http://www.crionics.com/products/opensource/faq/swing_ex/JTableExamples2.html
//Original example doesn't work
/**
* @version 1.0 12/03/98
*/

 

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;

 

/**
* @version 1.0 11/09/98
*/
public class MultiLineTreeExample extends JFrame {
public MultiLineTreeExample() {
super("Multi-Line JTree Example");

String[] strs = { "swing", // 0
"package", // 1
"java.awt.swing\n"
+ "multiple line tree\n"+"Just for fun", // 2
"javax.swing", // 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.setCellRenderer(new MultiLineCellRenderer());
JScrollPane sp = new JScrollPane();
sp.getViewport().add(tree);
getContentPane().add(sp, BorderLayout.CENTER);
}

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