如题，
Java Swing JCheckBox中的复选框的边框怎样去除？
Java JCheckBox中的复选框有一个四方形的边框，选中的话就是一个吊钩。现在只想有一个吊钩，不想要那个边框，请问哪位大侠能给出解决方案？
是JCheckBox类有专门的UI方法更改，还是必须继承JCheckBox类然后重写一些方法？
------解决方案--------------------
- Java code
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;public class C extends JDialog { /** * Launch the application * @param args */ public static void main(String args[]) { EventQueue.invokeLater(new Runnable() { public void run() { try { C dialog = new C(); dialog.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); dialog.setVisible(true); } catch (Exception e) { e.printStackTrace(); } } }); } /** * Create the dialog */ public C() { 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 Icon getDefaultIcon() { return new ColumnControlIcon(); } public synchronized void paint(Graphics g, JComponent c) { AbstractButton b = (AbstractButton) c; ButtonModel model = b.getModel(); Dimension size = c.getSize(); int w = size.width; int h = size.height; 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 = (Icon) b.getRolloverSelectedIcon(); if (altIcon == null) { altIcon = (Icon) b.getSelectedIcon(); } } else { altIcon = (Icon) b.getSelectedIcon(); } } else if (b.isRolloverEnabled() && model.isRollover()) { altIcon = (Icon) b.getRolloverIcon(); } if (altIcon == null) { altIcon = b.getIcon(); } altIcon.paintIcon(c, g, iconRect.x, iconRect.y); } else { 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(); }}