Java窗体Hello World

打算玩玩手机开发(Android)先回忆一下Java语法。
用Java开发Windows程序意义不大，简单熟悉一下。
重要是Android开发，搞一个手机围棋玩玩，现在好用的手机围棋不多。
会围棋的不懂编程，懂编程的不会围棋，这是个问题，本人围棋比编程水平高，呵呵。
有同好的朋友，请留言一起玩玩手机围棋。

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Hello {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        System.out.println("hello");
        PlafFrame frame = new PlafFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }

}
// A Frae with a button panel for chaing look and fell
class PlafFrame extends JFrame {

    public static final int DEFAULT_WIDTH = 300;
    public static final int DEFAULT_HEITHT = 200;

    public PlafFrame() {

        setTitle("PlaF Test");
        setBounds(350, 250, DEFAULT_WIDTH, DEFAULT_HEITHT);
        PlafPanel panel = new PlafPanel();
        add(panel);
    }

}

// A panel with buttons to change the pluggable look and fell
class PlafPanel extends JPanel {
    public PlafPanel() {
        UIManager.LookAndFeelInfo[] infos = UIManager
                .getInstalledLookAndFeels();
        for (UIManager.LookAndFeelInfo info : infos)
            makeButton(info.getName(), info.getClassName());

    }

    void makeButton(String name, final String plafName) {

        // add button to panel

        JButton button = new JButton(name);
        add(button);

        // set button action

        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent event) {

                // button action :switch to the new look and feel
                try {
                    UIManager.setLookAndFeel(plafName);
                    SwingUtilities.updateComponentTreeUI(PlafPanel.this);

                } catch (Exception e) {
                    e.printStackTrace();
                }

            }

        });
    }

}

url:http://greatverve.cnblogs.com/archive/2011/12/29/java-window-hello-world.html#