jtable refresh

[seredi]

I am able to load new data to jtable but when I click jcheckbox, the old data comes up.
pls run the prog and help me where i have gone wrong.

    import java.awt.BorderLayout;
    import java.awt.EventQueue;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import javax.swing.JButton;
    import javax.swing.JComponent;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.JScrollPane;
    import javax.swing.JTable;
    import javax.swing.table.DefaultTableModel;

	public class MainWindow extends JFrame {
	JTable table;
	private static final int CHECK_COL = 3;
       String[] columnNames = {
            "Country", "Capital", "Population in Millions", "Democracy"};
        Object[][] data = {
            {"USA", "Washington DC", 280, false},
            {"Canada", "Ottawa", 32, false},
            {"United Kingdom", "London", 60, false},
            {"Germany", "Berlin", 83, false},
            {"France", "Paris", 60, false},
            {"Norway", "Oslo", 4.5, false},
            {"India", "New Deli", 1046, false}
        };
        DefaultTableModel dtm ;
      // static JScrollPane scrollpane= new JScrollPane();
     public MainWindow() {
        setTitle("Marking of data");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JButton button1 = new JButton("load");
        button1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
            	if(dtm!=null){
            		System .out .println("NOT EMPTY");
            		int c = dtm.getRowCount();
       			// for (int i=c-1; i>=0; i--)
       			// {
       				// dtm.removeRow(i);
       				// table.revalidate();
       			// }
            	  	loadtable();
                     }
            	if(dtm==null){
            		System .out .println("EMPTY");
            		loadtable();
            	}
            }
        });
        
        JButton button = new JButton("check");
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                for (int row = 0; row < table.getRowCount(); row++) {
                    Boolean b = ((Boolean) table.getValueAt(row, CHECK_COL));
                    if (b.booleanValue()) {
                        System.out.print("row " + row + " is " + b + ": ");
                        for (int col = 0; col < table.getColumnCount(); col++) {
                            System.out.print(table.getValueAt(row, col) + " ");
                        }
                        System.out.println();
                    }
                }
            }
        });
        JPanel buttonpanel1 = new JPanel();
        buttonpanel1.add(button1);
        JPanel buttonpanel = new JPanel();
        buttonpanel.add(button);
        add(buttonpanel, BorderLayout.SOUTH);
        add(buttonpanel1, BorderLayout.NORTH);
        pack();
        setLocationByPlatform(true);
        setVisible(true);
    }
        public void loadtable(){
        	dtm = new DefaultTableModel(data, columnNames) {
                @Override
                public Class getColumnClass(int col) {
                    return getValueAt(0, col).getClass();
                }
                @Override
                public boolean isCellEditable(int rowIndex, int colIndex) {
                    return (colIndex == CHECK_COL);
                }
            };
            table = new JTable(dtm);
            JScrollPane scrollpane = new JScrollPane(table);
            add(scrollpane, BorderLayout.CENTER);
            pack();
            setVisible(true);
        }
    

    public static void main(String args[]) {
        EventQueue.invokeLater(new Runnable() {

            @Override
            public void run() {
                new MainWindow();
            }
        });
    }
    }

help needed. pls.

[JosAH]

After the content of you table has changed (behind its back!) send a tableChanged( ... ) to your JTable.

kind regards,

Jos

[DarrylBurke]

Moving to AWT/Swing

db