Java Swing JCheckBox中的复选框的边框怎样去除？

Question

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？

Answer 1

CheckBox.setFocusPainted(false); 

Answer 2

Java Swing JCheckBox中的复选框的边框怎样去除？.....\求解答

Answer 3

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();
}}

Answer 4

哦，谢了。我看了一遍，您的意思是重写了UI中的getDefaultIcon()和paint()方法。我会试试。。

Answer 5

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;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();
    }}