JTextArea：如何将字符串从另一个类追加到JTextArea

Question

I have a simple GUI which has a JTextArea . I have created a method to get a message from the user and another to append text to the text area as follows

Message m = new Message();

...

private void messageBtnActionPerformed(java.awt.event.ActionEvent evt) {   
     m.getMessage();
}

public void printOnTextArea(String text){
    jTextArea.append(text);
}

I am calling this method from my Message.java class like so

SimpleGUI simpleGUI = new SimpleGUI():

...

public void getMessage(){
    String message = JOptionPane.showInputDialog("Please enter message");
    printMessage(message);
}

public void printMessage (String message){
    simpleGUI.printOnTextArea(message);
}

But even though the message entered to the JOptionPane is being passed to the printOnTextArea() correctly, it is not appearing on the JTextArea, does anybody see what i am doing wrong?

Answer 1

Ive found months ago this TextAreaWriter .. it could be helpful i think

http://pastebin.com/THGccgGu

Its for SWT but should work with awt too