Java 超链接

import java.awt.Cursor;
import java.awt.Desktop;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class LinkLabel extends JLabel {
private String text, url;
private boolean isSupported;

public LinkLabel(String text, String url) {
this.text = text;
this.url = url;
try {
this.isSupported = Desktop.isDesktopSupported()
&& Desktop.getDesktop().isSupported(Desktop.Action.BROWSE);
} catch (Exception e) {
this.isSupported = false;
}
setText(false);
addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
setText(isSupported);
if (isSupported)
setCursor(new Cursor(Cursor.HAND_CURSOR));
}

public void mouseExited(MouseEvent e) {
setText(false);
}

public void mouseClicked(MouseEvent e) {
try {
Desktop.getDesktop().browse(
new java.net.URI(LinkLabel.this.url));
} catch (Exception ex) {
}
}
});
}

private void setText(boolean b) {
if (!b)
setText("<html><font color=blue><u>" + text);
else
setText("<html><font color=red><u>" + text);
}

public static void main(String[] args) {
JFrame jf = new JFrame("一个超链接实现的例子");
JPanel jp = new JPanel();
jp.add(new LinkLabel("谷歌中国", "http://g.cn"));
jf.setContentPane(jp);
jf.pack();
jf.setVisible(true);
}
}

 

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