Java Swing How to - Run JProgressBar on a timer from 1 to 100

Question

We would like to know how to run JProgressBar on a timer from 1 to 100.

Answer

import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
//from w  w  w.  j a v a  2  s.c  o  m
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.Timer;

public class Main {

  public static void main(String[] args) {
    CountUpProgressBar cdpb = new CountUpProgressBar();
  }
}
class CountUpProgressBar extends JPanel {
  JProgressBar bar = new JProgressBar(JProgressBar.HORIZONTAL, 0, 100);
  JLabel label = new JLabel("", JLabel.CENTER);
  Timer timer = new Timer(100, new ActionListener() {
    int counter = 1;
    @Override
    public void actionPerformed(ActionEvent ae) {
      label.setText(String.valueOf(counter));
      bar.setValue(++counter);
      if (counter > 100) {
        timer.stop();
      }
    }
  });
  CountUpProgressBar() {
    super.setLayout(new GridLayout(0, 1));
    bar.setValue(0);
    timer.start();
    this.add(bar);
    this.add(label);
    JOptionPane.showMessageDialog(null, this);
  }
}