我编写了这个尝试创建自定义 JButton 的小程序，不幸的是我无法移除边框。我以为 button.setBorder(null); 会删除它，但这是无效的。有谁知道如何从按钮上删除边框，所以它只是图标？非常感谢任何帮助。
我的代码如下：
package custombuttons;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class CustomButtons {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
CustomButtons h = new CustomButtons();
h.setUp();
}
JFrame frame;
JPanel panel;
JButton button;
BufferedImage b;
String toolTip = "Configure";
public void setUp() {
frame = new JFrame("Custom Buttons");
try {
b = ImageIO.read(CustomButtons.class.getResource("/images/config.png"));
} catch (IOException ex) {
Logger.getLogger(CustomButtons.class.getName()).log(Level.SEVERE, null, ex);
ex.printStackTrace();
}
Image b1 = (Image) b;
ImageIcon iconRollover = new ImageIcon(b1);
int w = iconRollover.getIconWidth();
int h = iconRollover.getIconHeight();
GraphicsConfiguration gc = frame.getGraphicsConfiguration();
Image image = gc.createCompatibleImage(w, h, Transparency.TRANSLUCENT);
Graphics2D g = (Graphics2D) image.getGraphics();
g.drawImage(iconRollover.getImage(), 0, 0, null);
g.dispose();
ImageIcon iconDefault = new ImageIcon(b1);
image = gc.createCompatibleImage(w, h, Transparency.TRANSLUCENT);
g = (Graphics2D) image.getGraphics();
g.drawImage(iconRollover.getImage(), 2, 2, null);
g.dispose();
ImageIcon iconPressed = new ImageIcon(b1);
JButton button = new JButton();
button.setIgnoreRepaint(true);
button.setFocusable(false);
button.setToolTipText(toolTip);
button.setBorder(null);
button.setContentAreaFilled(false);
button.setIcon(iconDefault);
button.setRolloverIcon(iconRollover);
button.setPressedIcon(iconPressed);
frame.setSize(500, 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new FlowLayout(FlowLayout.LEFT));
panel = new JPanel();
panel.setOpaque(false);
panel.add(button);
frame.getContentPane().add(panel);
frame.setVisible(true);
}
}