Here's how you can use the expand and collapse node icons (on a JTree) from the Windows "look and feel" within another look and feel.
Place the following lines at the beginning of your application:
UIManager.put("Tree.expandedIcon", new WindowsTreeUI.ExpandedIcon()); UIManager.put("Tree.collapsedIcon", new WindowsTreeUI.CollapsedIcon());
Also, include the following import in the class: import com.sun.java.swing.plaf.windows.*;
Any JTree objects will now use the plus and minus icons!
This article was contributed by Steve Rylander.