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 Diabled icon

The following code disable JTree node dynamically. Disabled icon has different icons assigned. This example has three files: DisabledNodeTreeExample.java,DisabledNode.java, GraydIcon.java, DisabledLeafIcon.java, DisabledFolderIcon.java

/*Example modified from http://www.crionics.com/products/opensource/faq/swing_ex/JTableExamples2.html
*/



import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.metal.*;

public class DisabledFolderIcon implements Icon {
int width = 16;
int height = 16;
int additionalHeight = 2;

public void paintIcon(Component c, Graphics g, int x, int y) {
int right = width - 1;
int bottom = height - 2;

g.setColor(c.getBackground());
g.fillRect(0,0, width, getIconHeight());

// Draw tab
g.setColor( MetalLookAndFeel.getControlDisabled() );
g.drawLine( right -5, 2, right , 2 );
g.drawLine( right -6, 3, right -6, 4 );
g.drawLine( right , 3, right , 4 );

// Draw outline
g.setColor( MetalLookAndFeel.getControlDisabled() );
g.drawLine( 0, 5, 0, bottom ); // left side
g.drawLine( 1, 4, right -7, 4 ); // first part of top
g.drawLine( right -6, 5, right -1, 5 ); // second part of top
g.drawLine( right , 4, right , bottom ); // right side
g.drawLine( 0, bottom, right , bottom ); // bottom
}

public int getIconWidth() { return width; }
public int getIconHeight() { return height + additionalHeight; }
}