Simultaneous updation of View and calculation

Question

Hello,
I need to procees huge data, and update it to a table. row by row. since all the updation takes a large amount of time, I am planning to update date after a certain calculation is done, (The updation is to a JTable) but the view is getting updated only after all the processing is done. Please tell me the best way to handle this kind of data updation, any design pattern that can be used... etc
Waiting eagerly.....
Message was edited by:
serjith

Answer 1

You can learn more about it here Lesson: Concurrency in Swing.
import javax.swing.*;
import javax.swing.table.TableModel;
public class UpdateInTime implements Runnable {
    JTable table;
    Thread thread = null;
    boolean working = false;
    public void run() {
        int count = 0;
        while(working && count < table.getRowCount()) {
            try {
                Thread.sleep(3000);
            } catch(InterruptedException e) {
                working = false;
                System.out.println("interrupted");
            System.out.println("updating row " + (count+1));
            TableModel model = table.getModel();
            int cols = model.getColumnCount();
            for(int j = 0; j < cols; j++) {
                Object value = "item " + (count*cols + j+1);
                model.setValueAt(value, count, j);
            count++;
        working = false;
        System.out.println("update cycle completed");
    private JScrollPane getComponent() {
        table = new JTable(12, 4);
        return new JScrollPane(table);
    private void start() {
        working = true;
        thread = new Thread(this);
        thread.setPriority(Thread.NORM_PRIORITY);
        thread.start();
    public static void main(String[] args) {
        UpdateInTime test = new UpdateInTime();
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.getContentPane().add(test.getComponent());
        f.setSize(400,400);
        f.setLocation(200,200);
        f.setVisible(true);
        test.start();
}