swing 显示边框

package Assis;  
  
import java.awt.*;  
import java.awt.event.*;  
import javax.swing.border.*;  
import javax.swing.*;  
  
public class BorderDemo extends JFrame {  
    private static final long serialVersionUID = 1L;  
  
    public BorderDemo() {  
        // 设置框架窗口的标题  
        super("使用边框的例子");  
        // 定义5个简单类型的边框  
        Border blackline, etched, raisedbevel, loweredbevel, empty;  
        // 创建黑色的线状边框  
        blackline = BorderFactory.createLineBorder(Color.black);  
        // 创建蚀刻边框  
        etched = BorderFactory.createEtchedBorder();  
        // 创建凸出边框  
        raisedbevel = BorderFactory.createRaisedBevelBorder();  
        // 创建凹陷边框  
        loweredbevel = BorderFactory.createLoweredBevelBorder();  
        // 创建空的边框  
        empty = BorderFactory.createEmptyBorder();  
  
        // First pane: simple borders  
        JPanel simpleBorders = new JPanel();  
        simpleBorders.setLayout(new BoxLayout(simpleBorders, BoxLayout.Y_AXIS));  
  
        addCompForBorder(blackline, "线状边框", simpleBorders);  
        addCompForBorder(etched, "蚀刻边框", simpleBorders);  
        addCompForBorder(raisedbevel, "凸出边框", simpleBorders);  
        addCompForBorder(loweredbevel, "凹陷边框", simpleBorders);  
        addCompForBorder(empty, "空的边框", simpleBorders);  
  
        // Second pane: titled borders  
        JPanel titledBorders = new JPanel();  
        titledBorders.setLayout(new BoxLayout(titledBorders, BoxLayout.Y_AXIS));  
        TitledBorder titled;  
  
        titled = BorderFactory.createTitledBorder("title");  
        addCompForBorder(titled, "default titled border"  
                + " (default just., default pos.)", titledBorders);  
  
        titled = BorderFactory.createTitledBorder(blackline, "title");  
        addCompForTitledBorder(titled, "titled line border"  
                + " (centered, default pos.)", TitledBorder.CENTER,  
                TitledBorder.DEFAULT_POSITION, titledBorders);  
  
        titled = BorderFactory.createTitledBorder(etched, "title");  
        addCompForTitledBorder(titled, "titled etched border"  
                + " (right just., default pos.)", TitledBorder.RIGHT,  
                TitledBorder.DEFAULT_POSITION, titledBorders);  
  
        titled = BorderFactory.createTitledBorder(loweredbevel, "title");  
        addCompForTitledBorder(titled, "titled lowered bevel border"  
                + " (default just., above top)",  
                TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.ABOVE_TOP,  
                titledBorders);  
  
        titled = BorderFactory.createTitledBorder(empty, "title");  
        addCompForTitledBorder(titled, "titled empty border"  
                + " (default just., bottom)",  
                TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.BOTTOM,  
                titledBorders);  
  
        // 创建TabbledPane组件  
        JTabbedPane tabbedPane = new JTabbedPane();  
  
        tabbedPane.addTab("简单的边框", null, simpleBorders, null);  
  
        tabbedPane.addTab("带有标题的边框", null, titledBorders, null);  
  
        tabbedPane.setSelectedIndex(0);  
  
        getContentPane().add(tabbedPane, BorderLayout.CENTER);  
    }  
  
    // 添加带有标题的边框  
    void addCompForTitledBorder(TitledBorder border, String description,  
            int justification, int position, Container container) {  
        border.setTitleJustification(justification);  
        border.setTitlePosition(position);  
        addCompForBorder(border, description, container);  
    }  
  
    // 添加简单的边框  
    void addCompForBorder(Border border, String description, Container container) {  
        JPanel comp = new JPanel(false);  
        JLabel label = new JLabel(description, JLabel.CENTER);  
        comp.setLayout(new GridLayout(1, 1));  
        comp.add(label);  
        comp.setBorder(border);  
  
        container.add(Box.createRigidArea(new Dimension(0, 10)));//设置间隔  
        container.add(comp);  
    }  
  
    // 程序的入口方法  
    public static void main(String[] args) {  
        JFrame frame = new BorderDemo();  
        // 添加框架窗口的事件监听（监听关闭框架窗口事件）  
        frame.addWindowListener(new WindowAdapter() {  
            public void windowClosing(WindowEvent e) {  
                // 正常推出Java虚拟机  
                System.exit(0);  
            }  
        });  
  
        // 显示框架窗口  
        frame.pack();  
        frame.setVisible(true);  
    }  
}