- Swing Programming Examples
- Example - Home
- Example - Environment Setup
- Example - Borders
- Example - Buttons
- Example - CheckBoxes
- Example - Combo Boxes
- Example - Color Choosers
- Example - Dialogs
- Example - Editor Panes
- Example - File Choosers
- Example - Formatted TextFields
- Example - Frames
- Example - Lists
- Example - Layouts
- Example - Menus
- Example - Password Fields
- Example - Progress Bars
- Example - Scroll Panes
- Example - Sliders
- Example - Spinners
- Example - Tables
- Example - Toolbars
- Example - Tree
- Swing Useful Resources
- Swing - Quick Guide
- Swing - Useful Resources
- Swing - Discussion
Swing Examples - Show indeterministic Progress Bar
Following example showcase how to show a indeterministic Progress bar in a Java Swing application.
We are using the following APIs.
JProgressBar − To create a progress bar field.
JProgressBar.setIndeterminate − To set the progress bar in indeterministic mode.
JProgressBar.setValue − To set the progress in progress bar.
Example
import java.awt.*; import java.awt.event.*; import javax.swing.*; public class SwingTester { private JFrame mainFrame; private JLabel headerLabel; private JLabel statusLabel; private JPanel controlPanel; public SwingTester(){ prepareGUI(); } public static void main(String[] args){ SwingTester swingControlDemo = new SwingTester(); swingControlDemo.showProgressBarDemo(); } private void prepareGUI(){ mainFrame = new JFrame("Java Swing Examples"); mainFrame.setSize(400,400); mainFrame.setLayout(new GridLayout(3, 1)); mainFrame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent windowEvent){ System.exit(0); } }); headerLabel = new JLabel("", JLabel.CENTER); statusLabel = new JLabel("",JLabel.CENTER); statusLabel.setSize(350,100); controlPanel = new JPanel(); controlPanel.setLayout(new FlowLayout()); mainFrame.add(headerLabel); mainFrame.add(controlPanel); mainFrame.add(statusLabel); mainFrame.setVisible(true); } private JProgressBar progressBar; private Task task; private JButton startButton; private JTextArea outputTextArea; private void showProgressBarDemo(){ headerLabel.setText("Control in action: JProgressBar"); progressBar = new JProgressBar(0, 100); progressBar.setIndeterminate(true); progressBar.setValue(0); progressBar.setStringPainted(true); startButton = new JButton("Start"); outputTextArea = new JTextArea("",5,20); JScrollPane scrollPane = new JScrollPane(outputTextArea); startButton.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { task = new Task(); task.start(); } }); controlPanel.add(startButton); controlPanel.add(progressBar); controlPanel.add(scrollPane); mainFrame.setVisible(true); } private class Task extends Thread { public Task(){ } public void run(){ for(int i =0; i<= 100; i+=10){ final int progress = i; SwingUtilities.invokeLater(new Runnable() { public void run() { progressBar.setIndeterminate(false); progressBar.setValue(progress); outputTextArea.setText(outputTextArea.getText() + String.format("Completed %d%% of task.\n", progress)); } }); try { Thread.sleep(100); } catch (InterruptedException e) {} } } } }
swingexamples_progress_bars.htm
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