JProgressBar Example in Swing for Beginners

The following example illustrates creating JProgressBar. This example covers four constructors and important methods of the JProgressBar class.

import javax.swing.*;
import java.awt.*;
class JProgressBarExample extends JFrame
{
JProgressBar p1,p2,p3,p4;

    public JProgressBarExample()
    {
        createAndShowGUI();
    }
   
    private void createAndShowGUI()
    {
        setTitle("JProgressBar Example");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLayout(new FlowLayout());
       
        p1=new JProgressBar();
        p2=new JProgressBar(SwingConstants.VERTICAL);
        p3=new JProgressBar(10,90);
        p4=new JProgressBar(SwingConstants.HORIZONTAL,10,50);
       
        // Set value
        p1.setValue(20);
        p2.setValue(40);
        p3.setValue(20);
        p4.setValue(40);
       
        // Set minimum,maximum
        p1.setMinimum(10);
        p1.setMaximum(40);
       
        // If you set more than maximum, then
        // maximum is considered, i.e.
        // here setValue(40) is substituted
        p1.setValue(42);
       
        System.out.println("Value of p1 is "+p1.getValue());
       
        // Set foreground
        p1.setForeground(Color.RED);
        p2.setForeground(Color.LIGHT_GRAY);
       
        // Set string painted
        // default string is <percent>%
        p1.setStringPainted(true);
        p2.setStringPainted(true);
        p3.setStringPainted(true);
       
        // Set custom string
        p3.setString("Processing..");
       
        // Set orientation
        p4.setOrientation(SwingConstants.VERTICAL);
       
        // Set indeterminate, means don't know
        // how much process was done
        p4.setIndeterminate(true);
       
        // Set border
        p1.setBorder(BorderFactory.createLineBorder(Color.RED,2,false));
       
        // Get value and percent complete
        // percent complete is out of 1 (between 0.0 - 1.0)
        System.out.println("Percent complete "+p1.getPercentComplete());
       
        add(p1);
        add(p2);
        add(p3);
        add(p4);
       
        setSize(400,400);
        setVisible(true);
    }
   
    public static void main(String args[])
    {
        new JProgressBarExample();
    }
}

Screenshot of JProgressBar Example


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Tags: Swing Components,