上次编写的俄罗斯方块，为了给它加一个超级链接，发现java居然如此的笨笨。不过方法还是有的。基础思想为调用桌面。启动浏览器，之前看过这个启动的办法，当时看了觉得java这个方法没什么用处，现在发现，设计了这个办法，就有他的用处。
package com.javaer.examples.awt;
import java.awt.Color;
import java.awt.Cursor;
import java.awt.Desktop;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.net.URI;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class FrameLink extends JLabel {
private String _url;
private String _text;
private Cursor cur_bak;
//加上超级链接底部的一条线
protected void paintBorder(Graphics g) {
int w = this.getSize().width;
int h = this.getSize().height;
g.drawLine(0, h - 1, w - 1, h - 1);// 底部加一条线条
}
public FrameLink(String text, String url) {
this.setForeground(Color.BLUE);//设置颜色
if (!url.startsWith("http://")) {
url = "http://" + url;
}
this._url = url;
this._text = text;
setText(text);
this.addMouseListener(new MouseAdapter() {
public void mouseEntered(MouseEvent e) {
cur_bak = getCursor();
setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));// 显示小手
}
public void mouseExited(MouseEvent e) {
setCursor(cur_bak);
}
//点击一瞬间
public void mousePressed(MouseEvent e) {
URI uri;
try {
uri = new URI(_url);
Desktop dt = Desktop.getDesktop();
if (Desktop.isDesktopSupported()
&& dt.isSupported(Desktop.Action.OPEN)) {
dt.browse(uri);
}
} catch (Exception x) {
}
// 仅仅对windows有效
// try {
// Runtime.getRuntime().exec("explorer " + _url);
// } catch (IOException e1) {
// e1.printStackTrace();
// }
}
});
}
// 测试
public static void main(String[] args) {
JFrame f = new JFrame();
f.setLayout(new FlowLayout());
FrameLink fl = new FrameLink("月小升", "http://java-er.com/");
f.add(fl);
f.setSize(500, 400);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
}
}
核心算法
uri = new URI(_url);
Desktop dt = Desktop.getDesktop();
if (Desktop.isDesktopSupported()
&& dt.isSupported(Desktop.Action.OPEN)) {
dt.browse(uri);
}