Public class regression{

        // method where i am initializing the jframe
         public void approximate(){

     this.findDerivative(this.exponential,this.quadratic);

     matrix expAve = new matrix(3,1);

     double beta1 = 0.9;

         loading frame = new loading();
         frame.setPreferredSize(new Dimension(500,500));
         frame.pack();
         frame.setVisible(true);

     for(int i=0;i<100000000;i++){

     matrix prev = expAve;

         expAve.times(beta1);

         matrix a = this.estimate.subtract(expAve);

     this.computeGradient(a);

     this.gradient.times(scale);

         prev.times(beta1);

         expAve = prev.addition(this.gradient);

     this.estimate = this.estimate.subtract(expAve);

         this.calcResidue();
         }

             }

         //progress bar class

         import java.awt.Dimension;
         import java.util.List;

         import javax.swing.JProgressBar;
         import javax.swing.SwingWorker;

         public class progressBar extends SwingWorker<Void, Integer> {

     private final JProgressBar progress;

     public progressBar(JProgressBar progress) {

     this.progress = progress;
         this.progress.setVisible(true);
     this.progress.setStringPainted(true);
         this.progress.setPreferredSize(new Dimension(500,100));

       }


    @Override
    protected Void doInBackground() throws Exception {

     for (int i = 100000000; i > 0; i--) {
         final int progr =((100 * (100000000 - i)) /100000000);
         publish(progr);
         setProgress(progr);

     }

     return null;

   }

 @Override
       protected void process(List<Integer> chunks) {
     progress.setValue(chunks.get(chunks.size() - 1));
     super.process(chunks);
      }
      @Override
     protected void done() {
     progress.setValue(100);
     }
     }

     import java.awt.BorderLayout;
     import java.awt.Color;
     import java.awt.Dimension;

     import javax.swing.JFrame;
     import javax.swing.JLabel;
     import javax.swing.JProgressBar;

    //extending jframe class
    public class loading extends JFrame{
public loading() {
setLayout(new BorderLayout());
    JProgressBar progress = new JProgressBar();
    JLabel j = new JLabel("loading");
    add(j, BorderLayout.NORTH);
    add(progress, BorderLayout.SOUTH);
    progressBar worker = new progressBar(progress);
    worker.execute();
    j.setPreferredSize(new Dimension(500,50));

}
    }