Progress Bar

import javax.swing.*;
import java.awt.*;

public class MyProgressBar extends JFrame{
    public static void main(String[] args){new MyProgressBar();}
    public MyProgressBar(){
        setUndecorated(true);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setPreferredSize(new Dimension(20,200));
        JProgressBar bar = new JProgressBar();
        bar.setIndeterminate(true);
        add(bar);
        pack();
        setVisible(true);
    }
}