Java如何为swing组件创建边框？
本示例说明了如何为摆动组件创建边框。在下面的示例中，我们设置JPanel组件的边框。一些边框实现，我们使用下面包括LineBorder，BevelBorder，EtchedBorder和MatteBorder。
package org.nhooo.example.swing;
import javax.swing.*;
import javax.swing.border.LineBorder;
import javax.swing.border.BevelBorder;
import javax.swing.border.EtchedBorder;
import javax.swing.border.MatteBorder;
import java.awt.*;
public class BorderDemo extends JFrame {
public BorderDemo() {
initializeUI();
}
private void initializeUI() {
setSize(400, 400);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setLayout(new BorderLayout(15, 15));
JPanel top = new JPanel();
top.setBorder(new LineBorder(Color.RED, 1, true));
JPanel bottom = new JPanel();
bottom.setBorder(new BevelBorder(BevelBorder.LOWERED));
JPanel left = new JPanel();
left.setBorder(new EtchedBorder(EtchedBorder.RAISED));
JPanel right = new JPanel();
right.setBorder(new MatteBorder(5, 5, 5, 5, Color.BLUE));
JPanel center = new JPanel();
center.setBorder(new BevelBorder(BevelBorder.RAISED));
getContentPane().add(top, BorderLayout.NORTH);
getContentPane().add(bottom, BorderLayout.SOUTH);
getContentPane().add(left, BorderLayout.WEST);
getContentPane().add(right, BorderLayout.EAST);
getContentPane().add(center, BorderLayout.CENTER);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new BorderDemo().setVisible(true);
}
});
}
}