Udskrivning af indkomne ascii data til text felt

I starten af jeres program skal I have koden:
JFrame f = new JFrame();
JTextArea t = new JTextArea(20,8);
f.getContentPane().add( t );
f.pack();
f.show();
I starten af jeres løkke skal I have:
t.setText("");
I jeres udskrift del skal I have:
t.append(currentLine+System.getProperty("line.separator");

I skal også have import javax.swing.*; øverst i jeres program.

JTextArea t = new JTextArea(8,20);

Jeg får følgende fejl når jeg kompiler:

symbol  : variable t
location: class WebnetMod3
              t.append(currentLine+System.getProperty("line.separator"));
              ^


Jeg har tilføjet t.append(currentLine+System.getProperty("line.separator"); i run og de andre variabler i min init.

Jeg kan e-maile hele koden til dig hvis det er til nogen hjælp

Du kan lægge koden herop så alle kan se den.
I jeres klasse skal I lige erklære
JTextArea t = new JTextArea(8,20);
således at det ikke ligger i en metode.
JFrame'en kan I bare erklære i jeres konstruktor.

Her kommer koden.....

/*
* WebnetMod3.java
*
* Created on 21. november 2002, 21:07
*/

/**
*
* @author  Ronald Dale Madsen
*/
import javax.swing.text.*;
import javax.swing.*;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;




public class WebnetMod3 extends JApplet implements Runnable, ActionListener
{
    Image warning;
  Thread runner=null;
  PrintWriter outStream=null;//use PrintWriter
  CommSemaphore tSemaphore;
  String dataStreamReceiver = null;
  Socket sock=null;
  BufferedReader inBuf=null;
  int portNum = 23;//Telnet port
  String hostAddr=null;
  String picVersionReceiver = null;
  String getPicVersionCommand = null;
  boolean picVersionReported = false, picVersionRequesting = false;
  JPanel row1=new JPanel();
  //ButtonGroup valg= new ButtonGroup();
  JButton startKnap = new JButton("Temp. START");
  JButton stopKnap = new JButton("Temp. STOP");
  int tempReadout=0, analogValue=0;
  String toprint=null;
  /////////////////////


 
  public void init()  // only called once by the webbrowser
  {
     
      Container felt=getContentPane();
        FlowLayout flo = new FlowLayout();
        startKnap.addActionListener(this);
        stopKnap.addActionListener(this);
        felt.setLayout(flo);
        felt.add(startKnap);
        felt.add(stopKnap);
        setContentPane(felt);
        warning=getImage(getCodeBase(),"stop.gif");
      JFrame f = new JFrame();
      JTextArea t = new JTextArea(8,20);
      f.getContentPane().add( t );
      f.pack();
      f.show();
        t.setText("");
      String val;
      Color background = null, rxColor, txColor, txtColor;

      //setLayout(null);

      background = getColorParameter("bgcolor");
      if (background!=null)  this.setBackground(background);
      txColor  = getColorParameter("txcolor");
      rxColor  = getColorParameter("rxcolor");
      txtColor = getColorParameter("textcolor");

      val = getParameter("upstreamreceiver");
      if (val != null)
        dataStreamReceiver = val;
 
      // Parameters used for getting the PIC software version
      val = getParameter("requestpicversion");
      if (val != null) getPicVersionCommand = val;
      val = getParameter("picversionreceiver");
      if (val != null) picVersionReceiver = val;

   

      tSemaphore=new CommSemaphore();
  }

  public Color getColorParameter(String paramName)
  {
      String val;
      Color theColor = null;
      val = getParameter(paramName);
      if (val != null) {
        if (val.compareTo("black") == 0)          theColor = Color.black;
        else if (val.compareTo("blue") == 0)      theColor = Color.blue;
        else if (val.compareTo("cyan") == 0)      theColor = Color.cyan;
        else if (val.compareTo("darkGray") == 0)  theColor = Color.darkGray;
        else if (val.compareTo("gray") == 0)      theColor = Color.gray;
        else if (val.compareTo("green") == 0)    theColor = Color.green;
        else if (val.compareTo("lightGray") == 0) theColor = Color.lightGray;
        else if (val.compareTo("magenta") == 0)  theColor = Color.magenta;
        else if (val.compareTo("orange") == 0)    theColor = Color.orange;
        else if (val.compareTo("pink") == 0)      theColor = Color.pink;
        else if (val.compareTo("red") == 0)      theColor = Color.red;
        else if (val.compareTo("white") == 0)    theColor = Color.white;
        else if (val.compareTo("yellow") == 0)    theColor = Color.yellow;
        else {
            try {
              theColor = Color.decode(val);
            }
            catch (java.lang.NumberFormatException excep) {
              theColor = null;
            }
            }
      }
      return theColor;
  }

  public void actionPerformed(ActionEvent event)
  {
      String kommando = event.getActionCommand();
      if (kommando =="Temp. START"){
          //her skal strengen til start af a/d konverteringen stå
          String command="<b";
          sendCmd(command);
      }
      if (kommando =="Temp. STOP"){
          //her skal stop kommandoen stå
          String command="<c";
          sendCmd(command);
      }
      // Coming up: String text = Integer.toHexString(value);
  }

  public String getAppletInfo()
  {
      return "Handles communication to/from a PIC that is attached to a WebNet.";
  }

  void status( String x )
  {
      if (x != null)
      showStatus(x);  // should apear in the "status window" of the browser
  }

//  public void paint(Graphics screen)
  //{
    //  tempReadout = analogValue*100/1024-25;//String.toString(toprint);
      //super.paint(screen);
      // Graphics2D screen2D=(Graphics2D) screen;
      // screen2D.setColor(Color.black);
      // screen2D.drawString("Temperatur i Celsius: " +tempReadout+" grader",5,50);
      // screen2D.drawString("(Dette vindue viser den aktuelle temperatur på WEBNET modul 3)",5,120);
      // screen2D.drawString("Copyright by: 3semit.dk  19/4-2002  rev.1.02)",5,140);
      // Her skal IF betingelsen for temperaturen indsættes(< -10 eller >+50)
      // if (tempReadout < -10) {
        //  screen2D.setColor(Color.red);
        //  screen2D.drawString("ADVARSEL!!! Temperaturen er for lav!!!",5,80);
        //    screen2D.drawImage(warning,500,50,this);
      // }
      // if (tempReadout > 50) {
      //    screen2D.setColor(Color.red);
      //    screen2D.drawString("ADVARSEL!!! Temperaturen er for høj!!!",5,80);
      //      screen2D.drawImage(warning,500,50,this);
      // }
      // screen2D.setColor(Color.black);
   
     
  // }

  public String getCommStatus()
  {
      if (sock != null)
        return "Ok!";
      else
        return "No connection";
  }

  public void sendCmd(String command)
  {
      if(runner==null) {
        startListener();
      }
      //      if (runner != null)
      {
        try
        {
            //meter.txOn(true);
            tSemaphore.lock();
            if (outStream != null && command != null) {
              outStream.print(command);
              outStream.flush();
              if (runner != null)  runner.sleep(20);
            }
            else {
              if (dataStreamReceiver != null)
                  doCallBack("No connection");
            }
            tSemaphore.unlock();
            //meter.txOn(false);
            // System.out.println("sendCmd: "+command );
        }
        catch( InterruptedException e ) {
            //meter.txOn(false);
            System.out.println("Exception in sendCmd():" + e.getMessage() );
            stopListener();
        }
      }
  }

  public
  synchronized
  void startListener()
  {
      if(runner==null) {
        runner = new Thread(this);
        if(runner!=null)  {
            tSemaphore.trylock();  // this will be released by run() procedure after init.
            runner.start();        // start running at run()
        }
      }
  }

  public synchronized void stopListener()
  {
      tSemaphore.unlock();
      runner = null;
  }

  public boolean reConnect()
  {
      boolean retVal=false;

      status("Connecting to host " + hostAddr );
      try { sock = new Socket( hostAddr, portNum);}
      catch (IOException e ) {
        if( e.getMessage()!=null )
            status("While opening connection: " + e.getMessage());
        sock = null;
      }
      if (sock != null) {
        try {
            sock.setSoTimeout( 2000 ); // timeout in [ms]
            inBuf = new BufferedReader( new InputStreamReader(sock.getInputStream()));
            outStream=new PrintWriter( sock.getOutputStream() );//use PrintWriter
            sock.setSoTimeout( 10000 ); // timeout in [ms]
            retVal = true;
            //if (meter != null) meter.enable(true);
        }
        catch( IOException e ) {
            if( e.getMessage()!=null ) {
              status("::start() while receiving upstream data: no data: " +
                      e.getMessage());
            }
            inBuf = null;
            outStream = null;
            sock = null;
        }
      }
      if (sock == null)
      {
        status("Connection refused by host" );
        //if (meter != null) meter.enable(false);
      }
      tSemaphore.unlock();
      return retVal;
  }

  public void requestPicSoftwareId()
  {
      if (!picVersionReported &&
          picVersionReceiver != null &&
          getPicVersionCommand != null)
      {
        try {runner.sleep(1000);}    // Wait for some time
        catch (InterruptedException slE) {}
        picVersionRequesting = true;
        sendCmd(getPicVersionCommand+"\n");
      }
  }
 

  public void start()
  {
      int retryCount = 3;
      boolean doRetry = true;
      String currentLine = getParameter("port");
      if (currentLine == null) portNum = 23;//telnet port******
      else                    portNum = Integer.parseInt(currentLine);
      hostAddr = getDocumentBase().getHost();

      sock = null;

      while (doRetry == true && retryCount-- > 0)
      {
        if (reConnect() == true)
            doRetry = false;
      }
      status("ok");

      if (!picVersionReported)
        requestPicSoftwareId();
  }

  public void stop()
  {
      if (sock != null) {
        try {sock.close();}
        catch ( IOException e ) {
            if( e.getMessage()!=null ) {
              System.out.println("sock.close() exception: " +
                                  e.getMessage());
            }
        }
      }
      outStream=null;
      inBuf = null;
      sock = null;
      stopListener();
      status("connection closed");
  }

  public void run()
  {
      int n=0;
      boolean replyUnknown=true;
      int fg, bg, grid, text;
      String currentLine;
      char charArray[];


      startListener();

      tSemaphore.unlock();
      //if (sock != null && meter != null) meter.enable(true);

      while ( runner != null && sock != null)
      {
        try {runner.sleep(20);}
        catch (InterruptedException slE) {}
        // meter.rxOn(false);
        if (inBuf != null)
        {
            try {
              currentLine = inBuf.readLine();
              // meter.rxOn(true);
            }
            catch (IOException e ) {
              currentLine = null;
              //meter.rxOn(false);
              status("No data available.");
            }
           
            if (currentLine != null)
              // her skal indsættes metode til udskrivning i text area
              t.append(currentLine+System.getProperty("line.separator"));
        }
      }
      stopListener();
  }
 
 
 
 

  /**
    * Returns parameters defined by this applet.
    * @return an array of descriptions of the receiver's parameters
    */

  // public java.lang.String[][] getParameterInfo()
  //{
      //String[][] info =
      //{
        //{"picversionreceiver", "String", "JavaScript function to receive PIC software version."},
        //{"requestpicversion", "String", "String with PIC command to request PIC software version."},
        // {"upstreamreceiver", "String", "JavaScript function to receive upstream data."},
        //{"port", "Number", "Telnet port number to connect."},
        //{"bgcolor", "Color", "Background color."},
        //{"rxcolor", "Color", "Color of the Rx LED."},
        //{"txcolor", "Color", "Color of the Tx LED."},
        //{"textcolor", "Color", "Color of the LED labels."}
    // };
    // return info;
  //}
//}

static int hexStringToInt(String line)
  {
      int value, index;
      char charArray[] = new char[256];
      if (line.charAt(0) == '<')
        line.getChars(2,5,charArray,0);
      else
        line.getChars(3,6,charArray,0);
      for (index = 0, value = 0; index<3; index++)
      {
        value *= 16;
        if (charArray[index] >= '0' && charArray[index] <= '9')
            value += charArray[index]-'0';
        else if (charArray[index] >= 'a' && charArray[index] <= 'f')
            value += charArray[index]-'a'+10;
        else if (charArray[index] >= 'A' && charArray[index] <= 'F')
            value += charArray[index]-'A'+10;
      }
      return value;
  }
 
 
 
  class CommSemaphore
{
  boolean locked;

  public CommSemaphore()
  {
      locked=false;
  }
   
  public synchronized  void lock()
      throws IllegalMonitorStateException, InterruptedException
  {
      if(locked) wait();
      locked=true;
  }

  public synchronized  boolean trylock()
  {
      boolean r=true;
      if(locked) {
        try {
            wait();
            locked=true;
        }
        catch ( Exception e ) {
            System.out.println("Semaphore::Exception:" + e.getMessage() );
            r=false;
        }
      }
      else
        locked=true;
      return r;
  }

  public synchronized void unlock()
  {
      locked=false;
      notify();  // will only start one waiting thread.
  }
}

 
    /** This method is called from within the constructor to
    * initialize the form.
    * WARNING: Do NOT modify this code. The content of this method is
    * always regenerated by the Form Editor.
    */
private void initComponents() {
   
    setFont(new java.awt.Font("Arial", 0, 12));
}

     


// Variables declaration - do not modify
// End of variables declaration

}

Jeg har tilføjet det nødvendige herunder;
der står //XXX hvor jeg har ændret noget.
Der mangler kun en ting, og det er at det
sted hvor I ved at nu skal i læse de syv
tal skal der stå t.setText("");
Jeg kender ikke logikken i programmet, så
I må selv tilføje det hvor det er nødvendigt.
Nu bliver der skrevet udover de syv linier,
men det virker forhåbentlig alligevel.
/*
* WebnetMod3.java
*
* Created on 21. november 2002, 21:07
*/

/**
*
* @author  Ronald Dale Madsen
*/
import javax.swing.text.*;
import javax.swing.*;
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.net.*;
import java.io.*;




public class WebnetMod3 extends JApplet implements Runnable, ActionListener
{
    Image warning;
  Thread runner=null;
  PrintWriter outStream=null;//use PrintWriter
  CommSemaphore tSemaphore;
  String dataStreamReceiver = null;
  Socket sock=null;
  BufferedReader inBuf=null;
  int portNum = 23;//Telnet port
  String hostAddr=null;
  String picVersionReceiver = null;
  String getPicVersionCommand = null;
  boolean picVersionReported = false, picVersionRequesting = false;
  JPanel row1=new JPanel();
  //ButtonGroup valg= new ButtonGroup();
  JButton startKnap = new JButton("Temp. START");
  JButton stopKnap = new JButton("Temp. STOP");
  JTextArea t; //XXX
  int tempReadout=0, analogValue=0;
  String toprint=null;
  /////////////////////



  public void init()  // only called once by the webbrowser
  {
   
      Container felt=getContentPane();
        FlowLayout flo = new FlowLayout();
        startKnap.addActionListener(this);
        stopKnap.addActionListener(this);
        felt.setLayout(flo);
        felt.add(startKnap);
        felt.add(stopKnap);
        setContentPane(felt);
        warning=getImage(getCodeBase(),"stop.gif");
      //JFrame f = new JFrame(); //XXX
      t = new JTextArea(8,20);//XXX
      felt.add( t );//XXX
      //f.pack();//XXX
      //f.show();//XXX
        t.setText("");
      String val;
      Color background = null, rxColor, txColor, txtColor;

      //setLayout(null);

      background = getColorParameter("bgcolor");
      if (background!=null)  this.setBackground(background);
      txColor  = getColorParameter("txcolor");
      rxColor  = getColorParameter("rxcolor");
      txtColor = getColorParameter("textcolor");

      val = getParameter("upstreamreceiver");
      if (val != null)
        dataStreamReceiver = val;

      // Parameters used for getting the PIC software version
      val = getParameter("requestpicversion");
      if (val != null) getPicVersionCommand = val;
      val = getParameter("picversionreceiver");
      if (val != null) picVersionReceiver = val;

 

      tSemaphore=new CommSemaphore();
  }

  public Color getColorParameter(String paramName)
  {
      String val;
      Color theColor = null;
      val = getParameter(paramName);
      if (val != null) {
        if (val.compareTo("black") == 0)          theColor = Color.black;
        else if (val.compareTo("blue") == 0)      theColor = Color.blue;
        else if (val.compareTo("cyan") == 0)      theColor = Color.cyan;
        else if (val.compareTo("darkGray") == 0)  theColor = Color.darkGray;
        else if (val.compareTo("gray") == 0)      theColor = Color.gray;
        else if (val.compareTo("green") == 0)    theColor = Color.green;
        else if (val.compareTo("lightGray") == 0) theColor = Color.lightGray;
        else if (val.compareTo("magenta") == 0)  theColor = Color.magenta;
        else if (val.compareTo("orange") == 0)    theColor = Color.orange;
        else if (val.compareTo("pink") == 0)      theColor = Color.pink;
        else if (val.compareTo("red") == 0)      theColor = Color.red;
        else if (val.compareTo("white") == 0)    theColor = Color.white;
        else if (val.compareTo("yellow") == 0)    theColor = Color.yellow;
        else {
            try {
              theColor = Color.decode(val);
            }
            catch (java.lang.NumberFormatException excep) {
              theColor = null;
            }
            }
      }
      return theColor;
  }

  public void actionPerformed(ActionEvent event)
  {
      String kommando = event.getActionCommand();
      if (kommando =="Temp. START"){
          //her skal strengen til start af a/d konverteringen stå
          String command="<b";
          sendCmd(command);
      }
      if (kommando =="Temp. STOP"){
          //her skal stop kommandoen stå
          String command="<c";
          sendCmd(command);
      }
      // Coming up: String text = Integer.toHexString(value);
  }

  public String getAppletInfo()
  {
      return "Handles communication to/from a PIC that is attached to a WebNet.";
  }

  void status( String x )
  {
      if (x != null)
      showStatus(x);  // should apear in the "status window" of the browser
  }

//  public void paint(Graphics screen)
  //{
    //  tempReadout = analogValue*100/1024-25;//String.toString(toprint);
      //super.paint(screen);
      // Graphics2D screen2D=(Graphics2D) screen;
      // screen2D.setColor(Color.black);
      // screen2D.drawString("Temperatur i Celsius: " +tempReadout+" grader",5,50);
      // screen2D.drawString("(Dette vindue viser den aktuelle temperatur på WEBNET modul 3)",5,120);
      // screen2D.drawString("Copyright by: 3semit.dk  19/4-2002  rev.1.02)",5,140);
      // Her skal IF betingelsen for temperaturen indsættes(< -10 eller >+50)
      // if (tempReadout < -10) {
        //  screen2D.setColor(Color.red);
        //  screen2D.drawString("ADVARSEL!!! Temperaturen er for lav!!!",5,80);
        //    screen2D.drawImage(warning,500,50,this);
      // }
      // if (tempReadout > 50) {
      //    screen2D.setColor(Color.red);
      //    screen2D.drawString("ADVARSEL!!! Temperaturen er for høj!!!",5,80);
      //      screen2D.drawImage(warning,500,50,this);
      // }
      // screen2D.setColor(Color.black);
 
   
  // }

  public String getCommStatus()
  {
      if (sock != null)
        return "Ok!";
      else
        return "No connection";
  }

  public void sendCmd(String command)
  {
      if(runner==null) {
        startListener();
      }
      //      if (runner != null)
      {
        try
        {
            //meter.txOn(true);
            tSemaphore.lock();
            if (outStream != null && command != null) {
              outStream.print(command);
              outStream.flush();
              if (runner != null)  runner.sleep(20);
            }
            else {
              if (dataStreamReceiver != null)
                  doCallBack("No connection");
            }
            tSemaphore.unlock();
            //meter.txOn(false);
            // System.out.println("sendCmd: "+command );
        }
        catch( InterruptedException e ) {
            //meter.txOn(false);
            System.out.println("Exception in sendCmd():" + e.getMessage() );
            stopListener();
        }
      }
  }

  public
  synchronized
  void startListener()
  {
      if(runner==null) {
        runner = new Thread(this);
        if(runner!=null)  {
            tSemaphore.trylock();  // this will be released by run() procedure after init.
            runner.start();        // start running at run()
        }
      }
  }

  public synchronized void stopListener()
  {
      tSemaphore.unlock();
      runner = null;
  }

  public boolean reConnect()
  {
      boolean retVal=false;

      status("Connecting to host " + hostAddr );
      try { sock = new Socket( hostAddr, portNum);}
      catch (IOException e ) {
        if( e.getMessage()!=null )
            status("While opening connection: " + e.getMessage());
        sock = null;
      }
      if (sock != null) {
        try {
            sock.setSoTimeout( 2000 ); // timeout in [ms]
            inBuf = new BufferedReader( new InputStreamReader(sock.getInputStream()));
            outStream=new PrintWriter( sock.getOutputStream() );//use PrintWriter
            sock.setSoTimeout( 10000 ); // timeout in [ms]
            retVal = true;
            //if (meter != null) meter.enable(true);
        }
        catch( IOException e ) {
            if( e.getMessage()!=null ) {
              status("::start() while receiving upstream data: no data: " +
                      e.getMessage());
            }
            inBuf = null;
            outStream = null;
            sock = null;
        }
      }
      if (sock == null)
      {
        status("Connection refused by host" );
        //if (meter != null) meter.enable(false);
      }
      tSemaphore.unlock();
      return retVal;
  }

  public void requestPicSoftwareId()
  {
      if (!picVersionReported &&
          picVersionReceiver != null &&
          getPicVersionCommand != null)
      {
        try {runner.sleep(1000);}    // Wait for some time
        catch (InterruptedException slE) {}
        picVersionRequesting = true;
        sendCmd(getPicVersionCommand+"\n");
      }
  }


  public void start()
  {
      int retryCount = 3;
      boolean doRetry = true;
      String currentLine = getParameter("port");
      if (currentLine == null) portNum = 23;//telnet port******
      else                    portNum = Integer.parseInt(currentLine);
      hostAddr = getDocumentBase().getHost();

      sock = null;

      while (doRetry == true && retryCount-- > 0)
      {
        if (reConnect() == true)
            doRetry = false;
      }
      status("ok");

      if (!picVersionReported)
        requestPicSoftwareId();
  }

  public void stop()
  {
      if (sock != null) {
        try {sock.close();}
        catch ( IOException e ) {
            if( e.getMessage()!=null ) {
              System.out.println("sock.close() exception: " +
                                  e.getMessage());
            }
        }
      }
      outStream=null;
      inBuf = null;
      sock = null;
      stopListener();
      status("connection closed");
  }

  public void run()
  {
      int n=0;
      boolean replyUnknown=true;
      int fg, bg, grid, text;
      String currentLine;
      char charArray[];


      startListener();

      tSemaphore.unlock();
      //if (sock != null && meter != null) meter.enable(true);

      while ( runner != null && sock != null)
      {
        try {runner.sleep(20);}
        catch (InterruptedException slE) {}
        // meter.rxOn(false);
        if (inBuf != null)
        {
            try {
              currentLine = inBuf.readLine();
              // meter.rxOn(true);
            }
            catch (IOException e ) {
              currentLine = null;
              //meter.rxOn(false);
              status("No data available.");
            }
         
            if (currentLine != null)
              // her skal indsættes metode til udskrivning i text area
              t.append(currentLine+System.getProperty("line.separator"));
        }
      }
      stopListener();
  }





  /**
    * Returns parameters defined by this applet.
    * @return an array of descriptions of the receiver's parameters
    */

  // public java.lang.String[][] getParameterInfo()
  //{
      //String[][] info =
      //{
        //{"picversionreceiver", "String", "JavaScript function to receive PIC software version."},
        //{"requestpicversion", "String", "String with PIC command to request PIC software version."},
        // {"upstreamreceiver", "String", "JavaScript function to receive upstream data."},
        //{"port", "Number", "Telnet port number to connect."},
        //{"bgcolor", "Color", "Background color."},
        //{"rxcolor", "Color", "Color of the Rx LED."},
        //{"txcolor", "Color", "Color of the Tx LED."},
        //{"textcolor", "Color", "Color of the LED labels."}
    // };
    // return info;
  //}
//}

static int hexStringToInt(String line)
  {
      int value, index;
      char charArray[] = new char[256];
      if (line.charAt(0) == '<')
        line.getChars(2,5,charArray,0);
      else
        line.getChars(3,6,charArray,0);
      for (index = 0, value = 0; index<3; index++)
      {
        value *= 16;
        if (charArray[index] >= '0' && charArray[index] <= '9')
            value += charArray[index]-'0';
        else if (charArray[index] >= 'a' && charArray[index] <= 'f')
            value += charArray[index]-'a'+10;
        else if (charArray[index] >= 'A' && charArray[index] <= 'F')
            value += charArray[index]-'A'+10;
      }
      return value;
  }



  class CommSemaphore
{
  boolean locked;

  public CommSemaphore()
  {
      locked=false;
  }
 
  public synchronized  void lock()
      throws IllegalMonitorStateException, InterruptedException
  {
      if(locked) wait();
      locked=true;
  }

  public synchronized  boolean trylock()
  {
      boolean r=true;
      if(locked) {
        try {
            wait();
            locked=true;
        }
        catch ( Exception e ) {
            System.out.println("Semaphore::Exception:" + e.getMessage() );
            r=false;
        }
      }
      else
        locked=true;
      return r;
  }

  public synchronized void unlock()
  {
      locked=false;
      notify();  // will only start one waiting thread.
  }
}


    /** This method is called from within the constructor to
    * initialize the form.
    * WARNING: Do NOT modify this code. The content of this method is
    * always regenerated by the Form Editor.
    */
private void initComponents() {
 
    setFont(new java.awt.Font("Arial", 0, 12));
}

   


// Variables declaration - do not modify
// End of variables declaration

}

Tusind tak for din hjælp Carsten. Jeg tror godt jeg kan klare det nu. Men jeg lægger lige et indlæg igen hvis det bliver nødvendigt.

200 points til dig :-)

I skriver bare igen hvis der er noget,lige nu er layout'et jo
ikke så pænt (FlowLayout er lidt kedeligt, og man
bestemmer intet selv).