applet示例 WelcomeApplet.java <Core Java> 

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;

import javax.swing.JApplet;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;

public class WelcomeApplet extends JApplet {
    private static final long serialVersionUID = 1L;
    public void init() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                setLayout(new BorderLayout());

                JLabel label = new JLabel("Hello "+getParameter("greeting"), SwingConstants.CENTER);
                label.setFont(new Font("Serif", Font.BOLD, 18));
                add(label, BorderLayout.CENTER);

                JPanel panel = new JPanel();

                JButton cayButton = new JButton("cnblogs");
                cayButton.addActionListener(makeAction("http://www.cnblogs.com"));
                panel.add(cayButton);

                add(panel, BorderLayout.SOUTH);

            }
            private ActionListener makeAction(final String string) {
                return new ActionListener() {
                    public void actionPerformed(ActionEvent event) {
                        try {
                            getAppletContext().showDocument(new URL(string));
                        } catch (Exception e) {
                            e.printStackTrace();
                        }
                    }
                };
            }
        });
    }
}

以上的java代码编译成class文件之后，新建一个index.html，内容如下：

<html>
<body>
<applet code="WelcomeApplet.class" width="200" height="200" >
    <param name="greeting" value="applet"/>
</applet>
</body>
</html>

 

一个带有传参，按钮的applet小程序就可以在网页上运行了，显示效果如下：

 

参考文献：  《Core Java 卷1》 第二章

posted @ 2013-08-30 20:05  yanghuahui  阅读(907)  评论(0)  编辑  收藏  举报