我正在构建的GUI界面上具有以下JButton。
我想使按钮周围的边框更粗,以便它从背景中脱颖而出。用Java可以做到吗?
最佳答案
您可以简单地使用LineBorder
JButton btn = ...;
btn.setBorder(BorderFactory.createLineBorder(Color.BLACK, 4));
查看How to Use Borders了解更多详细信息和想法
根据模型状态更新边界状态
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GridBagLayout;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.border.Border;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class Test {
public static void main(String[] args) {
new Test();
}
public Test() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public static class TestPane extends JPanel {
protected static final Border NORMAL_BORDER = BorderFactory.createLineBorder(Color.BLACK, 4);
protected static final Border ROLLOVER_BORDER = BorderFactory.createLineBorder(Color.RED, 4);
public TestPane() {
JButton btn = new JButton("Click me!");
btn.setContentAreaFilled(false);
btn.setBorder(NORMAL_BORDER);
btn.getModel().addChangeListener(new ChangeListener() {
@Override
public void stateChanged(ChangeEvent e) {
if (btn.getModel().isRollover()) {
btn.setBorder(ROLLOVER_BORDER);
} else {
btn.setBorder(NORMAL_BORDER);
}
}
});
setLayout(new GridBagLayout());
add(btn);
}
}
}