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POJtable/JScrollPanel won't refresh (update data)
 

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  1. POJtable/JScrollPanel won't refresh (update data)
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    <p>I have setup a <code>JTable</code> with paging - which works very well, but I have a problem with updating data to the table. table.repaint() is not working. Here is the code that I am using. Thanks in advance!</p> <pre><code>String[][] data = new String[100][4]; String[] columnNames = new String[]{ "IP", "PC_NAME", "ttl", "db"}; </code></pre> <p>Constructor:</p> <pre><code>gui(){ JTable table = new JTable(data, columnNames); JScrollPane scrollPane = new JScrollPane(table); JButton next = new JButton("next"); JButton prev = new JButton("prev"); next.addActionListener(this); prev.addActionListener(this); JPanel panel = new JPanel(new BorderLayout()); JPanel buttonPanel = new JPanel(); buttonPanel.add(prev); buttonPanel.add(next); panel.add(buttonPanel, BorderLayout.SOUTH); panel.add(table.getTableHeader(), BorderLayout.PAGE_START); panel.add(scrollPane, BorderLayout.CENTER); getContentPane().add(panel);} </code></pre> <p>ActionListener:</p> <pre><code>public void actionPerformed(ActionEvent e) { if (e.getActionCommand() == "next") { Rectangle rect = scrollPane.getVisibleRect(); JScrollBar bar = scrollPane.getVerticalScrollBar(); int blockIncr = scrollPane.getViewport().getViewRect().height; bar.setValue(bar.getValue() + blockIncr); scrollPane.scrollRectToVisible(rect); } if (e.getActionCommand() == "prev") { Rectangle rect = scrollPane.getVisibleRect(); JScrollBar bar = scrollPane.getVerticalScrollBar(); int blockIncr = scrollPane.getViewport().getViewRect().height; bar.setValue(bar.getValue() - blockIncr); scrollPane.scrollRectToVisible(rect); }} </code></pre> <p>Here is the function that store data into an array:</p> <pre><code>int i=0; public void WriteMonitorData (String IP, String PC_NAME, String ttl, String gw) { data[i][0]=IP; data[i][1]=PC_NAME; data[i][2]=ttl; data[i][3]=gw; i++; table.repaint(); scrollPane.repaint(); } </code></pre> <p><strong>Edit 1:</strong></p> <p>I tried with DefaultTableModel and still no luck. Here is code that I used for updating table. Constructor code didn't changed. Declaration:</p> <pre><code>private static final long serialVersionUID = 1L; String[][] data = new String[100][4]; String[] columnNames = new String[]{ "IP", "PC_NAME", "ttl", "db"}; DefaultTableModel model = new DefaultTableModel(data,columnNames); JTable table = new JTable(model); JScrollPane scrollPane = new JScrollPane(table); </code></pre> <p>Here is function that updated table:</p> <pre><code> public void WriteMonitorData (String IP, String PC_NAME, String ttl, String gw) { System.out.println(IP); model.setValueAt(IP, i, 0); model.setValueAt(PC_NAME, i, 1); model.setValueAt(ttl, i, 2); model.setValueAt(gw, i, 3); i++; model.fireTableDataChanged(); table.repaint(); scrollPane.repaint(); } </code></pre>
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    1. This table or related slice is empty.
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    1. USZhiZha
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    1. This table or related slice is empty.
    1. This table or related slice is empty.
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      1. POJtable/JScrollPanel won't refresh (update data)
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    1. COPlease clean up your code indentation. All code on the same block should be uniformly indented (I like 3 spaces myself). If you don't do this, you are making it more difficult than it needs to be for a volunteer to review and understand your code and this really isn't fair to us.
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      1. USHovercraft Full Of Eels
    2. COAlso please spend a little time and describe the details of your problem. We certainly can't run this code fragment and so if you don't post compilable code, you need to give us enough information for us to be able to make reasonable guesses as to the source of the problem. This will require information supplied by **you**.
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      1. USHovercraft Full Of Eels
    3. COI have other class that call function WriteMonitorData and pass 4 strings. When function WriteMonitorData is called I stored passed string to variable data that contains data for table. Problem is that table data doesn't refresh. I successfully store passed string to variable data but for some reason table rows are empty
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