Java实现一种个性化的CheckBox

Java实现一种个性化的CheckBox：

package com.han;      import java.awt.Dimension;   import java.awt.EventQueue;   import java.awt.Font;   import java.awt.FontMetrics;   import java.awt.Graphics;   import java.awt.Insets;   import java.awt.Rectangle;   import java.awt.event.WindowAdapter;   import java.awt.event.WindowEvent;      import javax.swing.AbstractButton;   import javax.swing.ButtonModel;   import javax.swing.Icon;   import javax.swing.JCheckBox;   import javax.swing.JComponent;   import javax.swing.JDialog;   import javax.swing.SwingUtilities;   import javax.swing.plaf.basic.BasicHTML;   import javax.swing.plaf.metal.MetalCheckBoxUI;   import javax.swing.plaf.metal.MetalLookAndFeel;   import javax.swing.text.View;      import sun.swing.SwingUtilities2;      /**   * 实现一种个性化的CheckBox   * @author HAN   *   */   public class CheckBoxCustomized extends JDialog {          /**       *        */       private static final long serialVersionUID = 5925267340818484608L;          /**       * Launch the application       * @param args       */       public static void main(String args[]) {           EventQueue.invokeLater(new Runnable() {               public void run() {                   try {                       CheckBoxCustomized dialog = new CheckBoxCustomized();                       dialog.addWindowListener(new WindowAdapter() {                           public void windowClosing(WindowEvent e) {                               System.exit(0);                           }                       });                       dialog.setVisible(true);                   } catch (Exception e) {                       e.printStackTrace();                   }               }           });       }          /**       * Create the dialog       */       public CheckBoxCustomized() {           super();           getContentPane().setLayout(null);           setBounds(100, 100, 500, 375);              final JCheckBox checkBox = new JCheckBox();           checkBox.setText("New JCheckBox");           checkBox.setBounds(87, 57, 118, 26);           getContentPane().add(checkBox);           //            MetalCheckBoxUI ui = new MetalCheckBoxUI(){                  public synchronized void paint(Graphics g, JComponent c) {                       AbstractButton b = (AbstractButton) c;                    ButtonModel model = b.getModel();                       Dimension size = c.getSize();                                        Font f = c.getFont();                    g.setFont(f);                    FontMetrics fm = SwingUtilities2.getFontMetrics(c, g, f);                       Rectangle viewRect = new Rectangle(size);                    Rectangle iconRect = new Rectangle();                    Rectangle textRect = new Rectangle();                       Insets i = c.getInsets();                    viewRect.x += i.left;                    viewRect.y += i.top;                    viewRect.width -= (i.right + viewRect.x);                    viewRect.height -= (i.bottom + viewRect.y);                       Icon altIcon = b.getIcon();                       String text = SwingUtilities.layoutCompoundLabel(                        c, fm, b.getText(), altIcon != null ? altIcon : getDefaultIcon(),                        b.getVerticalAlignment(), b.getHorizontalAlignment(),                        b.getVerticalTextPosition(), b.getHorizontalTextPosition(),                        viewRect, iconRect, textRect, b.getIconTextGap());                       // fill background                     if(c.isOpaque()) {                        g.setColor(b.getBackground());                        g.fillRect(0,0, size.width, size.height);                    }                          // Paint the radio button                     if(altIcon != null) {                           if(!model.isEnabled()) {                            if(model.isSelected()) {                               altIcon = b.getDisabledSelectedIcon();                            } else {                               altIcon = b.getDisabledIcon();                            }                        } else if(model.isPressed() && model.isArmed()) {                            altIcon = b.getPressedIcon();                            if(altIcon == null) {                                // Use selected icon                                 altIcon = b.getSelectedIcon();                            }                        } else if(model.isSelected()) {                            if(b.isRolloverEnabled() && model.isRollover()) {                                    altIcon = b.getRolloverSelectedIcon();                                    if (altIcon == null) {                                            altIcon = b.getSelectedIcon();                                    }                            } else {                                    altIcon = b.getSelectedIcon();                            }                        } else if(b.isRolloverEnabled() && model.isRollover()) {                            altIcon = b.getRolloverIcon();                        }                           if(altIcon == null) {                            altIcon = b.getIcon();                        }                           altIcon.paintIcon(c, g, iconRect.x, iconRect.y);                       } else {                        System.out.println("here");                        // paint the button icon by myself                         if (model.isEnabled()) {                            if (model.isPressed() && model.isArmed()) {                                g.setColor(MetalLookAndFeel.getControlShadow());                                g.fillRect(iconRect.x, iconRect.y, 13, 13);                            }                            g.setColor(c.getForeground());                        } else {                            g.setColor(MetalLookAndFeel.getControlShadow());                        }                           if (model.isSelected()) {                            int controlSize = 13;                            g.fillRect(iconRect.x + 3, iconRect.y + 5, 2,                                    controlSize - 8);                            g.drawLine(iconRect.x + (controlSize - 4),                                    iconRect.y + 3, iconRect.x + 5, iconRect.y                                            + (controlSize - 6));                            g.drawLine(iconRect.x + (controlSize - 4),                                    iconRect.y + 4, iconRect.x + 5, iconRect.y                                            + (controlSize - 5));                        }                    }                          // Draw the Text                     if(text != null) {                        View v = (View) c.getClientProperty(BasicHTML.propertyKey);                        if (v != null) {                            v.paint(g, textRect);                        } else {                           int mnemIndex = b.getDisplayedMnemonicIndex();                           if(model.isEnabled()) {                               // *** paint the text normally                                g.setColor(b.getForeground());                           } else {                               // *** paint the text disabled                                g.setColor(getDisabledTextColor());                           }                           SwingUtilities2.drawStringUnderlineCharAt(c,g,text,                                   mnemIndex, textRect.x, textRect.y + fm.getAscent());                       }                       if(b.hasFocus() && b.isFocusPainted() &&                          textRect.width > 0 && textRect.height > 0 ) {                           paintFocus(g,textRect,size);                       }                    }               }           };                      checkBox.setUI(ui);           System.out.println(checkBox.isFocusPainted());           checkBox.setFocusPainted(false); // this is optional            System.out.println();       }      }