Late loading of icon image files: public Object makeIcon(Class baseClass, String imageFile). : Look and Feel « Swing « Java Tutorial

1. Java Tutorial
2. Swing
3. Look and Feel

Object iconObject = LookAndFeel.makeIcon(this.getClass(), "World.gif");
UIManager.put("Tree.leafIcon", iconObject);

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.LookAndFeel;
import javax.swing.UIManager;

public class LookAndFeelMakeIcon {
  public static void main(String args[]) {
    JFrame frame = new JFrame("Lazy Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Object iconObject = LookAndFeel.makeIcon(LookAndFeelMakeIcon.class, "yourFile.gif");
    UIManager.put("Tree.leafIcon", iconObject);

     JTree tree = new JTree();
    JScrollPane scrollPane = new JScrollPane(tree);

    frame.add(scrollPane, BorderLayout.CENTER);
    frame.setSize(200, 200);
    frame.setVisible(true);
  }
}

14.119.Look and Feel
	14.119.1.	LookAndFeel Introduction
	14.119.2.	Listing the names of the look-and-feel classes that are installed with the JDK
	14.119.3.	Changing the Look and Feel to MotifLookAndFeel
	14.119.4.	Install Cross Platform Look And Feel
	14.119.5.	Changing the Look and Feel
	14.119.6.	Get the system look and feel
	14.119.7.	Start up a program from the command line with a new look and feel.
	14.119.8.	Late loading of icon image files: public Object makeIcon(Class baseClass, String imageFile).
	14.119.9.	Windows look and feel in Java 6
	14.119.10.	Default look and feel can be set in a file called 'swing.properties' located in the '/lib' directory.
	14.119.11.	Demonstrating the new GTK look and feel