package javax.swing.plaf.basic; import javax.swing.plaf.*; import javax.swing.*; import java.awt.*; public class BasicViewportUI extends ViewportUI { public static ComponentUI createUI(final JComponent c) { return new BasicViewportUI(); } public void installUI(final JComponent c) { super.installUI(c); } public Dimension getPreferredSize(JComponent c) { Dimension d = new Dimension(100,100); System.out.println("BasicViewportUI->preff->"+d); return d; } void paint(Graphics g, JComponent c) { System.out.println("BasicViewportUI->paint->"+c); } }