初めに

 * Javaでモジュールを提供する場合、PromptやEclipseで提供するよりも
   画面で起動したほうが何かと都合がいいので、その際にSwingを使用してみる。
  (別に、デモ、社内用、テスト(スタブ/ドライバー)用ならSwingでもいいかと)

サンプル

 * Start/Stopボタンを付け、標準出力表示用にTextAreaを付けてみた。

SwingBase.java

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.PrintStream;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;

public class SwingBase extends JFrame implements ActionListener {
   /** */
   private static final long serialVersionUID = -4658271370655854940L;
   private static final String TITLE = "This is title";
   private static final String ICON = "etc/icon.jpg";
   private static final int X_COORDINATE_SCREEN = 600;
   private static final int Y_COORDINATE_SCREEN = 200;
   private static final int WIDTH_SCREEN = 800;
   private static final int HEIGHT_SCREEN = 500;
   private static final int ROW_TEXT_AREA = WIDTH_SCREEN - 50;
   private static final int COLUMN_TEXT_AREA = HEIGHT_SCREEN - 50;
   JButton strartButton;
   JButton stopButton;
   JTextArea outoutTextArea;

   public SwingBase() {
      JPanel northPanel = new JPanel();
      JPanel westPanel = new JPanel();
      JPanel centerPanel = new JPanel();
      JPanel eastPanel = new JPanel();
      JPanel southPanel = new JPanel();

      // For North Panel
      JLabel outputLabel = new JLabel("<html><h1>[Output Log]</h1></html>",
            JLabel.CENTER);
      northPanel.add(outputLabel);

      // For West Panel
      westPanel.setVisible(false);

      // For East Panel
      eastPanel.setVisible(false);

      // For Center Panel
      this.outoutTextArea = new JTextArea();
      this.redirectConsole(this.outoutTextArea);
      JScrollPane outoutScrollPane = new JScrollPane(this.outoutTextArea,
            JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
            JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
      outoutScrollPane.setPreferredSize(new Dimension(ROW_TEXT_AREA,
            COLUMN_TEXT_AREA));
      centerPanel.add(outoutScrollPane);

      // For South Panel
      this.strartButton = new JButton("Start");
      this.stopButton = new JButton("Stop");
      southPanel.add(this.strartButton);
      southPanel.add(this.stopButton);
      this.strartButton.addActionListener(this);
      this.stopButton.addActionListener(this);

      // For Layout
      this.setLayout(new BorderLayout());
      this.getContentPane().add(northPanel, BorderLayout.NORTH);
      this.getContentPane().add(westPanel, BorderLayout.WEST);
      this.getContentPane().add(centerPanel, BorderLayout.CENTER);
      this.getContentPane().add(eastPanel, BorderLayout.EAST);
      this.getContentPane().add(southPanel, BorderLayout.SOUTH);

      this.setTitle(TITLE);
      this.setBounds(X_COORDINATE_SCREEN, Y_COORDINATE_SCREEN, WIDTH_SCREEN,
            HEIGHT_SCREEN);

      // Title ICON
      ImageIcon icon = new ImageIcon(ICON);
      this.setIconImage(icon.getImage());

      // For Close
      this.setDefaultCloseOperation(EXIT_ON_CLOSE);
      this.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent e) {
            try {
               stop();
            } catch (Exception err) {
            }
         }
      });
   }

   public static void main(String args[]) {
      SwingBase userInterface = new SwingBase();
      userInterface.showScreen();
   }

   @Override
   public void actionPerformed(ActionEvent actionEvent) {
      Object control = actionEvent.getSource();
      if (control == this.strartButton) {
         this.strat();
      } else if (control == this.stopButton) {
         this.stop();
      }
   }

   public void showScreen() {
      this.setVisible(true);
   }

   public void strat() {
      //TODO Do something
   }

   public void stop() {
      //TODO Do something
   }

   private void redirectConsole(JTextArea textarea) {
      ByteArrayOutputStream bytes = new ByteArrayOutputStream() {
         @Override
         public synchronized void flush() throws IOException {
            textarea.setText(toString());
         }
      };

      PrintStream out = new PrintStream(bytes, true);
      System.setErr(out);
      System.setOut(out);
   }
}