create java console inside the panel

How can I create an instance of the Java console inside of a panel?

From stackoverflow

• Here's a functioning class - you'll have to replace my library function EzTimer with Thread.sleep() and try/catch the InterruptedException.

  You can install an instance of this into the system out and err using

  PrintStream con=new PrintStream(new TextAreaOutputStream(...));
  System.setOut(con);
  System.setErr(con);
  

  Here's the class

  import java.io.*;
  import java.util.*;
  import javax.swing.*;
  
  public class TextAreaOutputStream
  extends OutputStream
  {
  
  // *****************************************************************************
  // INSTANCE PROPERTIES
  // *****************************************************************************
  
  private JTextArea                       textArea;                               // target text area
  private int                             maxLines;                               // maximum lines allowed in text area
  private LinkedList                      lineLengths;                            // length of lines within text area
  private int                             curLength;                              // length of current line
  private byte[]                          oneByte;                                // array for write(int val);
  
  // *****************************************************************************
  // INSTANCE CONSTRUCTORS/INIT/CLOSE/FINALIZE
  // *****************************************************************************
  
  public TextAreaOutputStream(JTextArea ta) {
      this(ta,1000);
      }
  
  public TextAreaOutputStream(JTextArea ta, int ml) {
      if(ml<1) { throw new IoEscape(IoEscape.GENERAL,"Maximum lines of "+ml+" in TextAreaOutputStream constructor is not permitted"); }
      textArea=ta;
      maxLines=ml;
      lineLengths=new LinkedList();
      curLength=0;
      oneByte=new byte[1];
      }
  
  // *****************************************************************************
  // INSTANCE METHODS - ACCESSORS
  // *****************************************************************************
  
  public synchronized void clear() {
      lineLengths=new LinkedList();
      curLength=0;
      textArea.setText("");
      }
  
  /** Get the number of lines this TextArea will hold. */
  public synchronized int getMaximumLines() { return maxLines; }
  
  /** Set the number of lines this TextArea will hold. */
  public synchronized void setMaximumLines(int val) { maxLines=val; }
  
  // *****************************************************************************
  // INSTANCE METHODS
  // *****************************************************************************
  
  public void close() {
      if(textArea!=null) {
          textArea=null;
          lineLengths=null;
          oneByte=null;
          }
      }
  
  public void flush() {
      }
  
  public void write(int val) {
      oneByte[0]=(byte)val;
      write(oneByte,0,1);
      }
  
  public void write(byte[] ba) {
      write(ba,0,ba.length);
      }
  
  public synchronized void write(byte[] ba,int str,int len) {
      try {
          curLength+=len;
          if(bytesEndWith(ba,str,len,LINE_SEP)) {
              lineLengths.addLast(new Integer(curLength));
              curLength=0;
              if(lineLengths.size()>maxLines) {
                  textArea.replaceRange(null,0,((Integer)lineLengths.removeFirst()).intValue());
                  }
              }
          for(int xa=0; xa<10; xa++) {
              try { textArea.append(new String(ba,str,len)); break; }
              catch(Throwable thr) {                                                 // sometimes throws a java.lang.Error: Interrupted attempt to aquire write lock
                  if(xa==9) { thr.printStackTrace(); }
                  else      { EzTimer.delay(200);    }
                  }
              }
          }
      catch(Throwable thr) {
          CharArrayWriter caw=new CharArrayWriter();
          thr.printStackTrace(new PrintWriter(caw,true));
          textArea.append(System.getProperty("line.separator","\n"));
          textArea.append(caw.toString());
          }
      }
  
  private boolean bytesEndWith(byte[] ba, int str, int len, byte[] ew) {
      if(len<LINE_SEP.length) { return false; }
      for(int xa=0,xb=(str+len-LINE_SEP.length); xa<LINE_SEP.length; xa++,xb++) {
          if(LINE_SEP[xa]!=ba[xb]) { return false; }
          }
      return true;
      }
  
  // *****************************************************************************
  // STATIC PROPERTIES
  // *****************************************************************************
  
  static private byte[]                   LINE_SEP=System.getProperty("line.separator","\n").getBytes();
  
  } /* END PUBLIC CLASS */
  

  OscarRyz : Look interesting. Do you have an screenshot?

  Software Monkey : Not much to see... it's a console window! But I see someone has already posted their test program with a pic in another answer.

  OscarRyz : It was me! :) , I couldn't resists.

• @Sofware Monkey:

  It works!! :)

  

  import javax.swing.*;
  import java.awt.*;
  import java.awt.event.*;
  import java.io.*;
  
  public class Main{
      public static void main( String [] args ) throws InterruptedException  {
          JFrame frame = new JFrame();
          frame.add( new JLabel(" Outout" ), BorderLayout.NORTH );
  
          JTextArea ta = new JTextArea();
          TextAreaOutputStream taos = new TextAreaOutputStream( ta, 60 );
          PrintStream ps = new PrintStream( taos );
          System.setOut( ps );
          System.setErr( ps );
  
  
          frame.add( new JScrollPane( ta )  );
  
          frame.pack();
          frame.setVisible( true );
  
          for( int i = 0 ; i < 100 ; i++ ) {
              System.out.println( i );
              Thread.sleep( 500 );
          }
      }
  }
  

  furtelwart : Please upvote his answer if it works.

  OscarRyz : If helps for anything. I've mark this as community wiki. At least I won't get points for something I didn't program.

• what is Ioscape