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POJFrame behaving weirdly
 

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  1. POJFrame behaving weirdly
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    <p>In my program, I am displaying images with a song in background. After song is finished, i need to close frame and <code>JInternalFrame</code>. Here is the code:</p> <pre><code>package projectfinal; import javax.swing.*; import java.io.File; import java.io.IOException; /* MORE IMPORTS */ public class ImagePanel extends javax.swing.JFrame { public static class audio extends JApplet { private static final int EXTERNAL_BUFFER_SIZE = 128000; public void aaudio() { String strFilename = "E:/zehreelay.wav"; File soundFile = new File(strFilename); AudioInputStream audioInputStream = null; try { audioInputStream = AudioSystem.getAudioInputStream(soundFile); } catch (Exception e) { e.printStackTrace(); System.exit(1); } AudioFormat audioFormat = audioInputStream.getFormat(); SourceDataLine line = null; DataLine.Info info = new DataLine.Info(SourceDataLine.class, audioFormat); try { line = (SourceDataLine) AudioSystem.getLine(info); line.open(audioFormat); } catch (LineUnavailableException e) { e.printStackTrace(); System.exit(1); } catch (Exception e) { e.printStackTrace(); System.exit(1); } line.start(); int nBytesRead = 0; byte[] abData = new byte[EXTERNAL_BUFFER_SIZE]; while (nBytesRead != -1) { try { nBytesRead = audioInputStream.read(abData, 0, abData.length); } catch (IOException e) { e.printStackTrace(); } if (nBytesRead &gt;= 0) { int nBytesWritten = line.write(abData, 0, nBytesRead); } } line.drain(); line.close(); jInternalFrame1.setVisible(false); /** * closing internal frame */ } } /** * Creates new form NewJFrame */ public ImagePanel() { initComponents(); } @SuppressWarnings("unchecked") // &lt;editor-fold defaultstate="collapsed" desc="Generated Code"&gt; private void initComponents() { jInternalFrame1 = new javax.swing.JInternalFrame(); jLabel1 = new javax.swing.JLabel(); jLabel2 = new javax.swing.JLabel(); jLabel3 = new javax.swing.JLabel(); jLabel4 = new javax.swing.JLabel(); jLabel5 = new javax.swing.JLabel(); jLabel6 = new javax.swing.JLabel(); javax.swing.GroupLayout jInternalFrame1Layout = new javax.swing.GroupLayout(jInternalFrame1.getContentPane()); //////////more code//////////////////////////////////// jInternalFrame1.getContentPane().setLayout(jInternalFrame1Layout); jInternalFrame1.addComponentListener(new java.awt.event.ComponentAdapter() { public void componentHidden(java.awt.event.ComponentEvent evt) { hiden(evt); } }); /////adding a listner for component/// } public static void main(String args[]) { start(); } private void hiden(java.awt.event.ComponentEvent evt) { setVisible(false); } public static void start() { java.awt.EventQueue.invokeLater(new Runnable() { public void run() { new ImagePanel().setVisible(true); } }); audio obj = new audio(); obj.aaudio(); } private static javax.swing.JInternalFrame jInternalFrame1; private javax.swing.JLabel jLabel1; private javax.swing.JLabel jLabel10; private javax.swing.JLabel jLabel11; private javax.swing.JLabel jLabel2; private javax.swing.JLabel jLabel3; /////more variables...////// } </code></pre> <p>This code is fine, but when I tried out <em>without</em> adding a component listener, that is, <code>getRootPane().SetVisible(false)</code> or <code>jInternalFrame1.getContentPane().setVisible(false)</code> or <code>setVisible(false)</code> none of them was working, but it worked out only after adding a component hidden listener. Why? Any reasons?Then how come <code>JInternalFrame</code> was working (<code>JInternalFrame.setVisible(false)</code>)? Is this something to do with <code>rootPane()</code>?</p>
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    1. UStrashgod
    1. USjoey rohan
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      1. VTUpMod
    1. COSwing GUI objects should be constructed and manipulated _only_ on the [event dispatch thread](http://docs.oracle.com/javase/tutorial/uiswing/concurrency/initial.html).
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      1. UStrashgod
    2. CO@trashgod then why does it work fine if we just normally say setVisible(false) ?Why not in this case?
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      1. USjoey rohan
    3. COTrashgod is right. Why can't you wrap the call in the SwingUtilities.invokeLater?
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      1. USStanislavL
 

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