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JAVA JTree Icon node

The following code adds icons on JTree node. Each node could have different icon. This example has four files:,, and

/*Example modified from

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

public class IconNodeRenderer extends DefaultTreeCellRenderer {

public Component getTreeCellRendererComponent(JTree tree, Object value,
boolean sel, boolean expanded, boolean leaf,
int row, boolean hasFocus) {

super.getTreeCellRendererComponent(tree, value,
sel, expanded, leaf, row, hasFocus);

Icon icon = ((IconNode)value).getIcon();

if (icon == null) {
Hashtable icons = (Hashtable)tree.getClientProperty("JTree.icons");
String name = ((IconNode)value).getIconName();
if ((icons != null) && (name != null)) {
icon = (Icon)icons.get(name);
if (icon != null) {
} else {

return this;


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Best books about JAVA programming from Amazon
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