重新初始化管道式IO流Java

Question

我正在处理管道输出流，以便在GUI中运行控制台命令；虽然我有点迷路。我正在尝试使用动作监听器重新执行主流程。但是我不能引用静态类。因此，基本上我想使用DispatchCommand JButtons ActionListener重新运行PipeShellCommand方法。我不确定要重构什么。谢谢，我知道我听起来像个新手，但这主要是针对Collage Club项目的。

import java.lang.*;
import java.io.*;
import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;

public class PipeShellCommand implements Runnable
{
 private PipedOutputStream pipeout;
 private PipedOutputStream pipeerr;

 String command = "cmd /K ";

public PipeShellCommand(String[] cmd) {

  pipeout = null;
  pipeerr = null;
}

 @Override
 public void run ()
 {
  exec ();
 }

 public void exec ()
 {
      // Class to redirect the process input stream to a piped output stream

      class OutputMonitor implements Runnable
      {
           InputStream is;
           PipedOutputStream pout;

           public OutputMonitor ( InputStream i, PipedOutputStream p )
           {
            is = i;
            pout = p;
           }
           @Override
           public void run ()
           {
                try
                {
                     int inputChar;

                     for ( ;; )
                     {
                        inputChar = is.read();
                        if ( inputChar == -1 )
                        { break; }

                        if ( pout == null )
                        {
                             System.out.write ( inputChar );
                        }
                        else
                        {
                             pout.write ( inputChar );

                        }
                   }
                   if ( pout != null )
                   {
                        pout.flush ();
                        pout.close ();
                   }
                   else
                   {
                        System.out.flush();
                   }
                }
                catch ( Exception e ) { e.printStackTrace (); }
           }
        }

      try
      {
           Runtime r = Runtime.getRuntime ();
           JOptionPane.showConfirmDialog(null, "(uses quotes for system Commands eg: \"java -jar BuildTools.jar --Latest \" )");
           String cmdargs = JOptionPane.showInputDialog("Type in Command:", "");
           Process p = r.exec (command + cmdargs);

           OutputMonitor out = new OutputMonitor ( p.getInputStream (), pipeout );
           OutputMonitor err = new OutputMonitor ( p.getErrorStream (), pipeerr );

           Thread t1 = new Thread ( out  );
           Thread t2 = new Thread ( err );

           t1.start ();
           t2.start ();
      }
      catch ( Exception e ) { e.printStackTrace (); }
 }

 public PipedInputStream getInputStream () throws IOException
 {
      pipeout = new PipedOutputStream ();
      return new PipedInputStream ( pipeout );
 }

 public PipedInputStream getErrorStream () throws IOException
 {
      pipeerr = new PipedOutputStream ();
      return new PipedInputStream ( pipeerr );
 }

 public void execInThread ()
 {
      Thread t = new Thread ( this );
      t.start ();
 }

 public static JPanel getContentPane ( JTextArea ta )
 {
      JPanel p = new JPanel ( new BorderLayout () );

      p.add ( new JScrollPane ( ta ), BorderLayout.CENTER );

      p.setPreferredSize ( new Dimension ( 640,480 ) );
      return p;
}

 public static void main ( String[] arg )
 {
      class GuiUpdate implements Runnable
      {
           private PipedInputStream pin;
           private PipedInputStream perr;
           private JTextArea outputArea;


            GuiUpdate ( JTextArea textArea, PipedInputStream in )
           {
             pin = in;
             outputArea = textArea;
           }

           @Override
          public void run ()
           {
                // Class to run on the event dispatch thread to update the GUI


                class UpdateSwing implements Runnable
                {
                     String update;
                     JTextArea swingTextArea;

                     public UpdateSwing ( JTextArea a, String s )
                     {
                          update = s;
                          swingTextArea = a;
                     }
                     public void run ()
                     {
                          outputArea.append ( update + "\n" );
                     }
                }

                try
                {
                     // Read file before displaying
                     BufferedReader r = new BufferedReader ( new InputStreamReader ( pin ) );
                     String line;

                     for ( ;; )
                     {
                          line = r.readLine ();
                          if ( line == null ) { break; }

                          SwingUtilities.invokeLater ( new UpdateSwing ( outputArea, line ) );

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

      // Create and invoke GUI

      JFrame f = new JFrame ( "Minecraft GUI" );
      f.setDefaultCloseOperation ( JFrame.ICONIFIED );
      JTextArea textOutput = new JTextArea (); 
      textOutput.setBackground(Color.BLACK);
      textOutput.setForeground(Color.red); 
      f.getContentPane().add ( getContentPane ( textOutput ) );
      JPanel bottom = new JPanel ( new FlowLayout () );


      JButton Exit = new JButton ( " Exit " );
      Exit.addActionListener ( new ActionListener ( )
                          {
                               public void actionPerformed ( ActionEvent e )
                               {
                                    System.exit ( 0 );
                               }
                          }
                     );
      JButton DispatchCommand = new JButton ( " Command " );
      DispatchCommand.addActionListener (new ActionListener() {
          @Override
          public void actionPerformed(ActionEvent e) {
           //Need To Re-Run Post Process Here 
          }
      });


      bottom.add ( Exit );
      bottom.add ( DispatchCommand );
      f.add ( bottom, BorderLayout.SOUTH );
      f.pack();
      f.show ();

      try
      {
           // Create command and setup the pipes

           PipeShellCommand pipe = new PipeShellCommand ( arg );

           PipedInputStream stdout_pipe = pipe.getInputStream ();
           PipedInputStream stderr_pipe = pipe.getErrorStream ();
           pipe.execInThread ( );

          // Results

           Thread t1 = new Thread ( new GuiUpdate ( textOutput, stdout_pipe ) );
           Thread t2 = new Thread ( new GuiUpdate ( textOutput, stderr_pipe ) );

           t1.start ();
           t2.start ();
      }
      catch ( Exception e ) { e.printStackTrace (); }
    }}

Example Of Project; Added Both Panels Via Paint.net