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    <p>First of all never use <code>Thread</code> to update GUI (Swing components) in java. Instead use <code>javax.swing.Timer</code> or <code>javax.swing.SwingWorker</code>. And for Basic I/O operation use <a href="http://docs.oracle.com/javase/tutorial/uiswing/components/progress.html" rel="nofollow noreferrer">ProgressMonitorInputStream</a> .<br> As simple example of reading a file and displaying it in JTextArea and with progrressbar..Have a look at the code given below:<br></p> <p><img src="https://i.stack.imgur.com/tFMsJ.jpg" alt="enter image description here"></p> <pre><code>import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.util.List; import java.io.*; import java.beans.*; class ProgressBarFrame extends JFrame { JProgressBar progressBar; int BUFFERSIZE = 10; JTextArea textArea; MyWorker worker; private void createAndShowGUI() { progressBar = new JProgressBar(0,100); progressBar.setStringPainted(true); JButton button = new JButton("Read File"); textArea = new JTextArea(30,100); JScrollPane jsp = new JScrollPane(textArea); Container c = getContentPane(); c.add(jsp); c.add(progressBar,BorderLayout.NORTH); c.add(button,BorderLayout.SOUTH); worker = new MyWorker(); button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent evt) { textArea.setText(""); progressBar.setValue(0); if (worker.getState()== SwingWorker.StateValue.DONE || worker.getState()==SwingWorker.StateValue.STARTED) { worker.cancel(true); worker = new MyWorker(); } worker.execute(); } }); pack(); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); } class MyWorker extends SwingWorker&lt;Void, String&gt; { MyWorker() { addPropertyChangeListener(new PropertyChangeListener() { public void propertyChange(PropertyChangeEvent evt) { if ("progress".equals(evt.getPropertyName())) { progressBar.setValue((Integer)evt.getNewValue()); } } }); } @Override public Void doInBackground() throws IOException { File file = new File("ProgressBarFrame.java"); long size = file.length(); long temp = 0; BufferedInputStream bfin = new BufferedInputStream(new FileInputStream(file)); byte[] buffer=new byte[BUFFERSIZE]; int totalRead = -1; while ((totalRead=bfin.read(buffer))!=-1 &amp;&amp; ! isCancelled()) { temp = temp + totalRead; publish(new String(buffer)); if (bfin.available()&lt;BUFFERSIZE &amp;&amp; bfin.available()!= 0) buffer = new byte[bfin.available()]; else if(bfin.available()==0) buffer = new byte[1]; else buffer=new byte[BUFFERSIZE]; setProgress((int)((temp/(float)size) * 100)); try{Thread.sleep(1);}catch(Exception ex){} } setProgress(100); return null; } @Override protected void process(List&lt;String&gt; chunks) { for (String value : chunks) { textArea.append(value); } } } public static void main(String st[]) { SwingUtilities.invokeLater(new Runnable() { @Override public void run() { ProgressBarFrame pf = new ProgressBarFrame(); pf.createAndShowGUI(); } }); } } </code></pre>
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    1. POProgress bar updater using up CPU
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    1. USVishal K
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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