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POJtable doesn't refresh/update data
 

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  1. POJtable doesn't refresh/update data
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    <p>I have a problem with <code>JTable</code>/<code>JScrollPane</code>. My data table is not refreshing/updating. I am using <code>DefultTableModel</code> and according to the code everything is fine and I don't have any errors. Also I have a table with paging and that's why I am using action listeners and buttons "prev" and "next". I am passing from other function to function that is coded in class where is <code>JTable</code>. Problem is that I fill arrays which contains data for table but table won't update/refresh it. Here is my code. Thanks advance.</p> <p><strong>BIG EDIT</strong> Old code was removed. I added new codes that will help you guys/girls to understand problem that I have. Hope that this will help. Regards.</p> <p>First here is class that show gui:</p> <pre><code>import javax.swing.*; public class Glavni { public static void main(String[] args) { // TODO Auto-generated method stub SwingUtilities.invokeLater(new Runnable() { public void run() { gui Scanner = new gui(); Scanner.setVisible(true); } }); } } </code></pre> <p>Second here is class that pass String to gui class that contains jtable</p> <pre><code>public class passDatatoTable { public void passData(){ String str1,str2,str3,str4; gui SendStringsToGUI = new gui(); for (int i =0;i&lt;=10;i++){ str1="Column 1 of row: "+i; str2="Column 2 of row: "+i; str3="Column 3 of row: "+i; str4="Column 4 of row: "+i; SendStringsToGUI.WriteMonitorData(str1, str2, str3, str4); } } } </code></pre> <p>Next here is declaration of gui (contructor):</p> <pre><code>import javax.swing.*; import javax.swing.table.DefaultTableModel; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class gui extends JFrame implements ActionListener { 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); int i=0; public void WriteMonitorData (String IP, String PC_NAME, String ttl, String gw) { System.out.println(IP);//just for testing (check if data was passed) 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(); } gui(){ JButton addData= new JButton("Add Data"); JButton next = new JButton("next"); JButton prev = new JButton("prev"); addData.addActionListener(this); next.addActionListener(this); prev.addActionListener(this); JPanel panel = new JPanel(new BorderLayout()); JPanel buttonPanel = new JPanel(); buttonPanel.add(addData); 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>Here is actionListeners:</p> <pre><code>public void actionPerformed(ActionEvent e) { if ("Add Data".equals(e.getActionCommand())){ passDatatoTable passSomeData = new passDatatoTable(); passSomeData.passData(); } if ("next".equals(e.getActionCommand())) { Rectangle rect = scrollPane.getVisibleRect(); JScrollBar bar = scrollPane.getVerticalScrollBar(); int blockIncr = scrollPane.getViewport().getViewRect().height; bar.setValue(bar.getValue() + blockIncr); scrollPane.scrollRectToVisible(rect); } if ("prev".equals(e.getActionCommand())) { Rectangle rect = scrollPane.getVisibleRect(); JScrollBar bar = scrollPane.getVerticalScrollBar(); int blockIncr = scrollPane.getViewport().getViewRect().height; bar.setValue(bar.getValue() - blockIncr); scrollPane.scrollRectToVisible(rect); } } </code></pre>
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    1. PO
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    1. This table or related slice is empty.
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    1. This table or related slice is empty.
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    1. COa) Please learn java naming conventions and stick to them. b) Never-ever call any of the fireXX methods outside of the model (the model _must_ handle that itself) c) never-ever call repaint (that's not needed)
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