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 DisabledLeafIcon implements Icon {
int width = 16;
int height = 16;
int additionalHeight = 4;

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

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

// Draw frame
g.setColor( MetalLookAndFeel.getControlDisabled() );
g.drawLine( 2, 2, 2, bottom ); // left
g.drawLine( 2, 2, right -4, 2 ); // top
g.drawLine( 2,bottom, right -1, bottom ); // bottom
g.drawLine( right -1, 8, right -1, bottom ); // right
g.drawLine( right -6, 4, right -2, 8 ); // slant 1
g.drawLine( right -5, 3, right -4, 3 ); // part of slant 2
g.drawLine( right -3, 4, right -3, 5 ); // part of slant 2
g.drawLine( right -2, 6, right -2, 7 ); // part of slant 2
}

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