《Java核心技术I》Swing中的边框

边框

BorderFactory静态方法创建边框，凹斜面，凸斜面，蚀刻，直线，蒙版，空白。

边框添加标题，BorderFactory.createTitledBorder

组合边框，BorderFactory.createCompoundBorder

JComponent的setBorder方法添加边框到组件。

package swing;import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionListener;import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.border.Border;
import javax.swing.border.MatteBorder;public class BorderTest {private static JPanel buttonPanel = new JPanel();private static ButtonGroup buttonGroup = new ButtonGroup();public static void main(String[] args) {JFrame frame = new JFrame("边框");addRadioButton("凹斜面", BorderFactory.createLoweredBevelBorder());addRadioButton("凸斜面", BorderFactory.createRaisedBevelBorder());addRadioButton("蚀刻", BorderFactory.createEtchedBorder());addRadioButton("直线", BorderFactory.createLineBorder(Color.BLUE));addRadioButton("蒙版", BorderFactory.createMatteBorder(1, 1, 1, 1, Color.RED));addRadioButton("空白", BorderFactory.createEmptyBorder());frame.add(buttonPanel,BorderLayout.CENTER);frame.setSize(600, 400);//初始打开为屏幕中央Toolkit toolkit = Toolkit.getDefaultToolkit();Dimension screenSize = toolkit.getScreenSize();int screenWidth = (int) screenSize.getWidth();int screenHeight = (int) screenSize.getHeight();//计算窗口位置int x = (screenWidth - frame.getWidth())/2;int y = (screenHeight - frame.getHeight())/2;frame.setLocation(x, y);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);}public static void addRadioButton(String name,Border border) {boolean selected = name.equals("空白");var button = new JRadioButton(name, selected);buttonGroup.add(button);Border titled = BorderFactory.createTitledBorder(border, name);buttonPanel.setBorder(titled);buttonPanel.add(button);ActionListener listener = e -> buttonPanel.setBorder(titled);;button.addActionListener(listener);}}