Create a vertical JLabel in Java

import java.awt.Dimension;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Rectangle;
import java.awt.geom.AffineTransform;
/*from   w  ww  .  ja  v  a  2s  .  c om*/
import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.plaf.basic.BasicLabelUI;

public class Main {
  public static void main(String[] argv) {
    JFrame frame = new JFrame("Popup JComboBox");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JLabel label = new JLabel("java2s.com");
    label.setUI(new VerticalLabelUI(true));
    frame.add(label);
    frame.setSize(300, 200);
    frame.setVisible(true);

  }
}

/**
 * This is the template for Classes.
 * 
 * 
 * @since carbon 1.0
 * @author Greg Hinkle, January 2002
 * @version $Revision: 1.4 $($Author: dvoet $ / $Date: 2003/05/05 21:21:27 $)
 * @copyright 2002 Sapient
 */
class VerticalLabelUI extends BasicLabelUI {
  static {
    labelUI = new VerticalLabelUI(false);
  }

  protected boolean clockwise;

  public VerticalLabelUI(boolean clockwise) {
    super();
    this.clockwise = clockwise;
  }

  public Dimension getPreferredSize(JComponent c) {
    Dimension dim = super.getPreferredSize(c);
    return new Dimension(dim.height, dim.width);
  }

  private static Rectangle paintIconR = new Rectangle();
  private static Rectangle paintTextR = new Rectangle();
  private static Rectangle paintViewR = new Rectangle();
  private static Insets paintViewInsets = new Insets(0, 0, 0, 0);

  public void paint(Graphics g, JComponent c) {

    JLabel label = (JLabel) c;
    String text = label.getText();
    Icon icon = (label.isEnabled()) ? label.getIcon() : label
        .getDisabledIcon();

    if ((icon == null) && (text == null)) {
      return;
    }

    FontMetrics fm = g.getFontMetrics();
    paintViewInsets = c.getInsets(paintViewInsets);

    paintViewR.x = paintViewInsets.left;
    paintViewR.y = paintViewInsets.top;

    // Use inverted height & width
    paintViewR.height = c.getWidth()
        - (paintViewInsets.left + paintViewInsets.right);
    paintViewR.width = c.getHeight()
        - (paintViewInsets.top + paintViewInsets.bottom);

    paintIconR.x = paintIconR.y = paintIconR.width = paintIconR.height = 0;
    paintTextR.x = paintTextR.y = paintTextR.width = paintTextR.height = 0;

    String clippedText = layoutCL(label, fm, text, icon, paintViewR,
        paintIconR, paintTextR);

    Graphics2D g2 = (Graphics2D) g;
    AffineTransform tr = g2.getTransform();
    if (clockwise) {
      g2.rotate(Math.PI / 2);
      g2.translate(0, -c.getWidth());
    } else {
      g2.rotate(-Math.PI / 2);
      g2.translate(-c.getHeight(), 0);
    }

    if (icon != null) {
      icon.paintIcon(c, g, paintIconR.x, paintIconR.y);
    }

    if (text != null) {
      int textX = paintTextR.x;
      int textY = paintTextR.y + fm.getAscent();

      if (label.isEnabled()) {
        paintEnabledText(label, g, clippedText, textX, textY);
      } else {
        paintDisabledText(label, g, clippedText, textX, textY);
      }
    }

    g2.setTransform(tr);
  }
}
/*
 * The contents of this file are subject to the Sapient Public License Version
 * 1.0 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at
 * http://carbon.sf.net/License.html.
 * 
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 * 
 * The Original Code is The Carbon Component Framework.
 * 
 * The Initial Developer of the Original Code is Sapient Corporation
 * 
 * Copyright (C) 2003 Sapient Corporation. All Rights Reserved.
 */