Writing in a Text Area from a different class.

Hi,
I need to write some text in a Text Area which is in a class I've call GUI where I handle all the graphic stuff but I need to do it from another class which handles packets that come through a COM port.
Is there anyway to do that?
Thanks!

Thank you! I'll try that but I think I might have problems with that since an instance of the Gui class was already created. I'm using the NetBeans Gui design form wich already makes the code for the Gui and this is what I have public class Gui extends javax.swing.JFrame {
    Connection connection = new Connection();
    /** Creates new form Gui */
    public Gui() {
        initComponents();
    /** 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.
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {
        bnConectar = new javax.swing.JButton();
        cbPuerto = new javax.swing.JComboBox();
        lblPuerto = new javax.swing.JLabel();
        jScrollPane1 = new javax.swing.JScrollPane();
        taPuerto = new javax.swing.JTextArea();
        bnPing = new javax.swing.JButton();
        jMenuBar1 = new javax.swing.JMenuBar();
        mArchivo = new javax.swing.JMenu();
        miNuevoP = new javax.swing.JMenuItem();
        miCargarP = new javax.swing.JMenuItem();
        miGuardarP = new javax.swing.JMenuItem();
        miSalir = new javax.swing.JMenuItem();
        mEdicion = new javax.swing.JMenu();
        mMonitorizacion = new javax.swing.JMenu();
        miMonON = new javax.swing.JMenuItem();
        miMonOFF = new javax.swing.JMenuItem();
        miPing = new javax.swing.JMenuItem();
        miConfig = new javax.swing.JMenuItem();
        mAyuda = new javax.swing.JMenu();
        miAcerca = new javax.swing.JMenuItem();
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("Monitorizaci?n");
        bnConectar.setFont(new java.awt.Font("Tahoma", 1, 11));
        bnConectar.setText("Conectar");
        bnConectar.setToolTipText("Conecta con el puerto seleccionado.");
        bnConectar.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                bnConectarActionPerformed(evt);
        cbPuerto.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));
        lblPuerto.setFont(new java.awt.Font("Tahoma", 1, 14));
        lblPuerto.setText("Puerto");
        taPuerto.setColumns(20);
        taPuerto.setRows(5);
        jScrollPane1.setViewportView(taPuerto);
        bnPing.setFont(new java.awt.Font("Tahoma", 1, 11));
        bnPing.setText("Ping");
        bnPing.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                bnPingActionPerformed(evt);
        mArchivo.setText("Archivo");
        miNuevoP.setText("Nuevo Proyecto");
        mArchivo.add(miNuevoP);
        miCargarP.setText("Cargar Proyecto");
        mArchivo.add(miCargarP);
        miGuardarP.setText("Guardar Proyecto");
        mArchivo.add(miGuardarP);
        miSalir.setText("Salir");
        mArchivo.add(miSalir);
        jMenuBar1.add(mArchivo);
        mEdicion.setText("Edici?n");
        jMenuBar1.add(mEdicion);
        mMonitorizacion.setText("Monitorizaci?n");
        miMonON.setText("Monitorizaci?n ON");
        mMonitorizacion.add(miMonON);
        miMonOFF.setText("Monitorizaci?n OFF");
        mMonitorizacion.add(miMonOFF);
        miPing.setText("Ping");
        mMonitorizacion.add(miPing);
        miConfig.setText("Configuraci?n");
        mMonitorizacion.add(miConfig);
        jMenuBar1.add(mMonitorizacion);
        mAyuda.setText("Ayuda");
        miAcerca.setText("Acerca");
        mAyuda.add(miAcerca);
        jMenuBar1.add(mAyuda);
        setJMenuBar(jMenuBar1);
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(lblPuerto)
                        .addGap(17, 17, 17)
                        .addComponent(cbPuerto, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                    .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                        .addComponent(bnPing)
                        .addComponent(bnConectar)))
                .addGap(45, 45, 45)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 214, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(287, Short.MAX_VALUE))
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap())
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(cbPuerto, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                            .addComponent(lblPuerto))
                        .addGap(18, 18, 18)
                        .addComponent(bnConectar)
                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 12, Short.MAX_VALUE)
                        .addComponent(bnPing)
                        .addContainerGap(172, Short.MAX_VALUE))))
        pack();
    }// </editor-fold>
    private void bnConectarActionPerformed(java.awt.event.ActionEvent evt) {
        try{
           connection.connect();
        }catch (XBeeException e){
    private void bnPingActionPerformed(java.awt.event.ActionEvent evt) {
        try{
           connection.ping();
        }catch (XBeeException e){
    * @param args the command line arguments
    public static void main(String args[]) throws Exception, InterruptedException {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
               new Gui().setVisible(true);
    }Would that be a problem?
Thanks again!

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public class Main {
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import java.awt.event.*;
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String whatlength;
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l2.getLineLength();
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app.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
app.setSize( 300, 300 );
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app.setVisible( true );
drawLine app1 = new drawLine(l2, 1);
app1.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
app1.setSize( 300, 300 );
app1.move(300,0) ;
app1.setVisible( true );
}

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pfiinit wrote:
The code works fine. What I want to know is, is there some way to use test.SomeOperation() from SomeClass without the test.?Yes you can by using a static import, but I don't recommend it. SomeOperation is a static method of the test class, and it's best to call it that way so you know exactly what your code is doing here.
2. No sense opening a second topic for this, so second question: Similarly, is there a good way to refer to System.out.println without the System.out.? Like the using keyword in C++.Again, you could use static imports, but again, I don't recommend it. Myself, I use Eclipse and set up its template so that when I type sop it automatically spits out System.out.println(). Most decent IDE's have this capability.
Also, you may wish to look up Java naming conventions, since if you abide by them, it will make it easier for others to understand your code.
Much luck and welcome to this forum!

Accessing XML data from a different class

Hi all,
I have an xml class that loads xml data, I need to access the data from another class. I have imported the xml classinto the new class and created a new instance of it. However when I try to access the xml data it is coming back as null. I understand this is almost certainly because when it is called the xml data hasn't completed it's load. How can I get round this?
xml class:
package {
    import flash.xml.*;
    import flash.events.*;
    import flash.net.*
    import flash.display.*
    public class xml extends MovieClip
        public var xmlRequest:URLRequest;
        public var xmlLoader:URLLoader;
        public var xmlImages:XML;
        public function xml()
            xmlRequest = new URLRequest("images.xml");
            xmlLoader = new URLLoader(xmlRequest)
            xmlLoader.addEventListener(Event.COMPLETE, xmlLoaded);
            xmlLoader.load(xmlRequest);
        private function xmlLoaded(event:Event):void
            trace(xmlLoader.data);
            xmlImages = new XML(xmlLoader.data);
Thanks in advance

One of the ways:
package {
     import flash.xml.*;
    import flash.events.*;
    import flash.net.*
    import flash.display.*
    public class XMLLoader extends EventDispatcher
          public var xmlRequest:URLRequest;
          public var xmlLoader:URLLoader;
          public var xmlImages:XML;
          public function XMLLoader()
          public function loadXML(url:String):void {
               xmlLoader = new URLLoader()
               xmlLoader.addEventListener(Event.COMPLETE, xmlLoaded);
               xmlLoader.load(new URLRequest(url));
          private function xmlLoaded(event:Event):void
               trace(xmlLoader.data);
               xmlImages = new XML(xmlLoader.data);
               dispatchEvent(event);
Usage:
var xmlLoader:XMLLoader = new XMLLoader();
xmlLoader.addEventListener(Event.COMPLETE, onXMLLoad);
xmlLoader.loadXML("images.xml"):
function onXMLLoad(e:Event):void{
     trace(xmlLoader.xmlImages);

Problem Using toString method from a different class

Hi,
I can not get the toString method to work from another class.
// First Class Separate file MyClass1.java
public class MyClass1 {
     private long num1;
     private double num2;
   public MyClass1 (long num1, double num2) throws OneException, AnotherException {
        // Some Code Here...
    // Override the toString() method
   public String toString() {
        return "Number 1: " + num1+ " Number 2:" + num2 + ".";
// Second Class Separate file MyClass2.java
public class MyClass2 {
    public static void main(String[] args) {
        try {
           MyClass1 myobject = new MyClass1(3456789, 150000);
           System.out.println(myobject);
         } catch (OneException e) {
              System.out.println(e.getMessage());
         } catch (AnotherException e) {
              System.out.println(e.getMessage());
}My problem is with the System.out.println(myobject);
If I leave it this way it displays. Number 1: 0 Number 2: 0
If I change the toSting method to accept the parameters like so..
public String toString(long num1, double num2) {
      return "Number 1: " + num1 + " Number 2:" + num2 + ".";
   }Then the program will print out the name of the class with some garbage after it MyClass1@fabe9. What am I doing wrong?
The desired output is:
"Number 1: 3456789 Number 2: 150000."
Thanks a lot in advance for any advice.

Well here is the entire code. All that MyClass1 did was check the numbers and then throw an error if one was too high or too low.
// First Class Separate file MyClass1.java public class MyClass1 {
     private long num1;
     private double num2;
     public MyClass1 (long num1, double num2) throws OneException, AnotherException {
     // Check num2 to see if it is greater than 200,000
     if (num2 < 10000) {
            throw new OneException("ERROR!: " +num2 + " is too low!");
     // Check num2 to see if it is greater than 200,000
     if (num2 > 200000) {
            throw new AnotherException ("ERROR!: " +num2 + " is too high!");
     // Override the toString() method
     public String toString() {
          return "Number 1: " + num1+ " Number 2:" + num2 + ".";
// Second Class Separate file MyClass2.java
public class MyClass2 {
    // Main method where the program begins.
    public static void main(String[] args) {
        // Instantiate first MyClass object.
        try {
           MyClass1 myobject = new MyClass1 (3456789, 150000);
           // if successful use MyClass1 toString() method.
           System.out.println(myobject);
                     // Catch the exceptions within the main method and print appropriate
                     // error messages.
         } catch (OneException e) {
              System.out.println(e.getMessage());
         } catch (AnotherException e) {
              System.out.println(e.getMessage());
         }I am not sure what is buggy. Everything else is working fine.

Writing in a Text Area from a different class.

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