How is messaging between Java classes best accomplished?

I have multiple classes and threads that need to write to a Java Swing JScrollPane. In the Android/Eclipse environment I used android.os.Message. Is there something similar in the NetBeans/Windows environment? Here is where I would like to send the message from:

public class PrintStatusTask extends Thread {
    PrintStatusTask(String name) { = name;
    private void sendMessage(String s) {
        // TODO: send message to jTextArea
    public void run() {
        sendMessage("Any message");

Here is an example of writing to the JScrollPane from the JFrame it lives in:

public class Controller extends javax.swing.JFrame implements Observer {


If you are writing to the pane itself (i.e. changing the data on the view) then the best way is to use a swing worker thread, and execute it later:


(Syntax might be slightly off - I am doing it from memory)

I'll second aperkins' suggestion to use SwingWorker as a more robust, general purpose solution.

In the particular case of append(): "This method is thread safe, although most Swing methods are not." Here is a simple example of using the method from another thread.

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