worker.execute();
        while (!worker.isDone())
        {
            myFeatureImpl = rootFeatureImpl;
        }
        return myFeatureImpl;

Result getResultInEventDispatchThread(){
   SwingWorkter.execute();
   SwingWorkter.waitForResults();
   return SwingWorkter.result();
}

 
for (int i = 0; i < myResults.length; i++){
     myHolding.fill(myResults[i]);
     myHoldingList.addChild(myHolding);
     buildSubTree(myHolding);
     myHolding = new Holding();

     SwingUtilities.invokeLater(new Runnable(){
            public void run(){
                  ProgressIndicator.setString(progress)
            }
      });

}

package ru.sql;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.concurrent.*;

/**
 * This class represents ...
 */
public class SecondaryLoopProgress
{
    static JProgressBar progressBar;

    public static void main(String[] args)
    {
        final JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(new BorderLayout());
        progressBar = new JProgressBar();
        frame.add(progressBar, BorderLayout.CENTER);
        Button button = new Button("Run in background");
        button.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e)
            {
                try
                {
                    String s = longRunningProcess();
                    JOptionPane.showMessageDialog(frame, "Method returns " + s);
                } catch (Exception ex)
                {
                    ex.printStackTrace();
                }
            }
        });
        frame.add(button, BorderLayout.SOUTH);
        frame.setSize(300, 100);
        frame.setVisible(true);
    }

    private static String longRunningProcess() throws ExecutionException, InterruptedException
    {
        final int loops = 100;
        progressBar.setMaximum(loops);
        progressBar.setStringPainted(true);
        final SecondaryLoop secondaryLoop = Toolkit.getDefaultToolkit().getSystemEventQueue().createSecondaryLoop();

        ExecutorService executorService = Executors.newFixedThreadPool(1);
        Future<String> future = executorService.submit(new Callable<String>()
        {
            public String call() throws Exception
            {
                for (int i = 0; i <= loops; i++)
                {
                    Thread.sleep(50);
                    final int v = i;
                    SwingUtilities.invokeLater(new Runnable()
                    {
                        public void run()
                        {
                            progressBar.setValue(v);
                            progressBar.setString(v + "%");
                        }
                    });
                }
                secondaryLoop.exit();
                return "Result";
            }
        });
        secondaryLoop.enter();
        return future.get();
    }
}

progressBar.setIndeterminate(true);

progressBar.setStringPainted(true);