StackOverflow2013

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POHow do you update a JDialog with new information?
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copied!<p>I have a Gui which allows the user to click a button and view the contents of a text file. The issue is that the file can be rather large (100,000+ rows of data) and can take upwards of 15 seconds to read and display in a table.</p> <p>An example of the format of the text file:</p> <pre><code>*/ Account ID : 8 digit number Money Charged : Integer < $10 Values separated by \t /* Account Id Money Charged ---------- -------------- 731298 3 359412 5 624937 1 </code></pre> <p>So when the button is clicked, it reads each line and puts each id into a map and increases the charges of the accounts.</p> <p>Once it is finished it will place a JTable inside a JDialog with the information. However, as soon as the button is clicked, the user could be confused as to what the program is doing as I've experienced upwards of 10-15 seconds of delay before the JDialog & JTable appears.</p> <p>So is there a way to make the JDialog appear with a string letting the user know that it is creating the table? (I thought it would be done using one of the JDialog methods such as <code>repaint()</code> or <code>validate</code> but those didn't seem to do the trick.</p> <p>Here is the order I'm thinking it should be done:</p> <pre><code>//Psuedo-code actionPerformed { create frame display label that lets user know its creating table read text file create map and place values remove label update dialog with table // unsure what to do to update it properly } </code></pre> <p><em><strong>So my overall question is simple:</em></strong> Is it possible to inform the user that it is currently calculating the data (via JLabel in the JDialog) and once the data is read, display the JTable (by updating the JDialog)?</p> <p>If needed, I can provide source. Not sure it's really needed though</p> <p><em><strong>Edit</em></strong></p> <pre><code>public void actionPerformed(ActionEvent event) { JFrame frame = new JFrame(); JDialog dialog = new JDialog(frame, "Account Charges", true); JLabel label = new JLabel("Currently calculating the charges") dialog.getContentPane().add(label); //add waiting label dialog.setVisible(true); readData(myFile); //read file and create table dialog.getContentPane().remove(label); //waiting label no longer needed dialog.getContentPane().add(myJtable); //update dialog with the table } </code></pre>

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