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POJava: setText on a JLabel in Swing issues
 

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  1. POJava: setText on a JLabel in Swing issues
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    <p>I have an issue setting a <code>JLabel</code>'s text using a method in the class creating the GUI from a different class calling that method. The method to set the <code>JLabel</code> is called outside the GUI but when called from inside the GUI class it works. I have tested the <code>getText()</code> method on the label after it is called from outside the GUI class and it shows that the label has been updated. I get that it is probably a paint issue or update issue with Swing but I'm at a loss of what to do. I have tried <code>repaint()</code> and <code>revalidate()</code> on the label and then panel that it is within. Here is my current code:</p> <pre><code>public void setStatusLabel(String statusEntered) { //Shows the variable statusEntered has been received System.out.println(statusEntered); //Not working status_label.setText(statusEntered); //Used this to check if the label receives the data. It does. String status = status_label.getText(); System.out.println(status); } </code></pre> <p>And the context in which I am calling it. Setups a database connection</p> <pre><code>//GUI Class reference MainWindow mainwindow = new MainWindow(); public void connect(){ Connection conn = null; try { String userName = "root"; String password = ""; String url = "jdbc:mysql://localhost:3306"; Class.forName("com.mysql.jdbc.Driver").newInstance(); conn = DriverManager.getConnection(url, userName, password); //This works System.out.println("Connection Established"); //The issue is with this guy mainwindow.setStatusLabel("Connection"); } catch(Exception e) { System.err.println("Failed to connect to database"); mainwindow.setStatusLabel("No connection"); } } </code></pre> <p>Any help with this would be awesome or if you have some links to suggestions, that would be awesome too! Thanks for the help.</p> <p>Here is my main:</p> <pre><code>public static void main(String[] args) { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new MainWindow().setVisible(true); } }); } </code></pre>
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    1. COIsn't that will create 2 different instances of MainWindow?
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      1. USCheok Yan Cheng
    2. CO@Yan: exactly so. He needs to pass the reference of this visualized MainWindow into his other class, perhaps by passing `this` in if the database class is created from within the MainWindow class. I'm waiting for more information from him about this.
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    3. COFor better help sooner, post an [SSCCE](http://pscode.org/sscce.html).
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      1. POJava: setText on a JLabel in Swing issues
      1. USAndrew Thompson
 

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