Creating a simple Progress Bar using JProgressBar

Program Description:

Today, I have created a simple progress bar program in Java using JProgressBar which consists of two separate programs/classes, the Main Program and the Plugin which is the progress bar property. The reason I separate these two classes is to understand the flow of the progress bar property easily which is our main objective in this project. So enjoy and leave some comments.

Output:

Code:

simpleProgressBar.java

/**
 * File: simpleProgressBar.java
 * Tiltle: Creating a Simple Progress Bar
 * Author: http://java-code-complete.blogspot.com/
 */

//Java Core Package
import javax.swing.*;
//Java Extension Package
import java.awt.*;
import java.awt.event.*;

public class simpleProgressBar extends JFrame {
 
 //Constructing JProgressBar and JButton 
 JProgressBar bar = new JProgressBar();
 JButton button = new JButton("Test Progress Bar");
    
 //Setting up GUI
    public simpleProgressBar() {
          
     //Setting up the Title of the Window
     super("Creating a Simple Progress Bar");

     //Set Size of the Window (WIDTH, HEIGHT)
     setSize(350,100);

     //Exit Property of the Window
     setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

     //Setting up the container ready for the components to be added.
     Container pane = getContentPane();
     setContentPane(pane);
     
     //Display the progress bar completion percentage label
     bar.setStringPainted(true);

     //Setting up the container layout
     GridLayout grid = new GridLayout(2,1);
     pane.setLayout(grid);
     
     //Adding the progress bar and the button to the container
     pane.add(bar);
     pane.add(button);
     
     //Implemeting Even-Listener on JButton
  button.addActionListener(
  new ActionListener() {
   
   //Handle JButton event if it is clicked
   public void actionPerformed(ActionEvent event) {
    button.setEnabled(false); //Disable the JButton if the progress bar starts the progress
    Thread run = new threadPlugin(bar); //Calling the class "threadPlugin" we created that extends with Thread
    run.start(); //run the thread to start the progress
    }
   }
  );

     /**Set all the Components Visible.
      * If it is set to "false", the components in the container will not be visible.
      */
     setVisible(true);
    }
    
 //Main Method
    public static void main (String[] args) {
     simpleProgressBar spb = new simpleProgressBar();
 }
}

threadPlugin.java

/**
 * File: threadPlugin.java
 * Tiltle: Creating a Simple Progress Bar (PLUGIN)
 * Author: http://java-code-complete.blogspot.com/
 */
 
 //Java Core Package
import javax.swing.*;
//Java Extension Package
import java.awt.*;
 
public class threadPlugin extends Thread {

  int Delay = 100; //Creating a delay or the speed of the progress bar
  JProgressBar pb; //Constructing Progress Bar
  
  //Creating a threadPlugin Method initializing JProgressBar so the Main Program "simpleProgressBar.java"
  //can recognize by the time we call this class for JProgressBar action.
  public  threadPlugin(JProgressBar progressbar) {
   pb = progressbar;
  }
  
  //run Method. This is the area where we can adjust the performance of our progress bar.
  public void run() {
      int minimum = pb.getMinimum(); //initializing minimum value of the progress bar
      int maximum = pb.getMaximum(); //initializing maximum value of the progress bar
      
      //Initializing Progress from its minimum value 0 to its maximum value 100
      for (int i = minimum; i < maximum; i++) { 
        try {
          int value = pb.getValue();
          pb.setValue(value + 1);
          
          //Testing the progress bar if it already reaches to its maximum value
          if (pb.getValue() >= maximum) {
          
          //Test confirmation if it runs perfectly
           JOptionPane.showMessageDialog(null, "Test Successful!","Success!",JOptionPane.INFORMATION_MESSAGE);
          }
           
          Thread.sleep(Delay); //Implementing the speed of the progress bar
        } catch (InterruptedException ignoredException) { //Catch an error if there is any
        }
      }
    }
 }