64_ProgressBar

// progress bar = Visual aid to let the user know what an operation is processing

<Main.java>
public class Main {
    public static void main(String[] args) {

        ProgressBarDemo demo = new ProgressBarDemo();

    }
}

<ProgressBarDemo.java> //count upwards
import javax.swing.*;
import java.awt.*;

public class ProgressBarDemo {
    JFrame frame = new JFrame();
    JProgressBar bar = new JProgressBar();

    ProgressBarDemo(){

        bar.setValue(0);
        bar.setBounds(0,0,420,50);
        bar.setStringPainted(true); //percentage will change when set value
        bar.setFont(new Font("MV Boli",Font.BOLD,25));
        bar.setForeground(Color.red); //fill colour
        bar.setBackground(Color.black); //bar ori colour unfilled

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(420,420);
        frame.setLayout(null);
        frame.setVisible(true);

        fill();

    }
    public void fill() {
        int counter = 0;
        while(counter<=100) {
            bar.setValue(counter);
            try {
                Thread.sleep(1000);
            }catch(InterruptedException e){
                e.printStackTrace();
            }
            counter += 10;
        }
        bar.setString("Done! :)");
    }
    
    /*
    //Count downward
    public void fill() {
        int counter = 500;
        while(counter>=0) {
            bar.setValue(counter);
            try {
                Thread.sleep(1000);
            }catch(InterruptedException e){
                e.printStackTrace();
            }
            counter -= 1;
        }
        bar.setString("Done! :)");
    }
    */
}