In Windows 10 there is a notification that opens in the bottom right of the screen and I find them quite useful.
Is there is any way to create Windows notifications in Java? This is what they look like:
I can successfully produce this result using this very simple sample code:
import java.awt.*;
import java.awt.TrayIcon.MessageType;
public class TrayIconDemo {
public static void main(String[] args) throws AWTException {
if (SystemTray.isSupported()) {
TrayIconDemo td = new TrayIconDemo();
td.displayTray();
} else {
System.err.println("System tray not supported!");
}
}
public void displayTray() throws AWTException {
//Obtain only one instance of the SystemTray object
SystemTray tray = SystemTray.getSystemTray();
//If the icon is a file
Image image = Toolkit.getDefaultToolkit().createImage("icon.png");
//Alternative (if the icon is on the classpath):
//Image image = Toolkit.getDefaultToolkit().createImage(getClass().getResource("icon.png"));
TrayIcon trayIcon = new TrayIcon(image, "Tray Demo");
//Let the system resize the image if needed
trayIcon.setImageAutoSize(true);
//Set tooltip text for the tray icon
trayIcon.setToolTip("System tray icon demo");
tray.add(trayIcon);
trayIcon.displayMessage("Hello, World", "notification demo", MessageType.INFO);
}
}
This can be achieved with the SystemTray and TrayIcon classes. Also, if this is a new API for you, you might want to check the dedicated tutorial "How to Use the System Tray".
you can use Notifications with javafx easily with Notification class
java.lang.Object
org.controlsfx.control.Notifications
public static showNotification(String title,String text){
Notifications notificationTest=Notifications.create();
notificationTest.position(Pos.BASELINE_RIGHT);
notificationTest.title(title);
notificationTest.text(text);
notificationTest.show();//for error noti notificationTest.showError();
}
https://www.javadoc.io/static/org.controlsfx/controlsfx/8.40.16/org/controlsfx/control/Notifications.html
On Mac OS, applications that run in the background sometimes have their icon attached to a gui or menu in the right corner of the screen. I believe it is similar to what Windows has on the bottom-right corner.
However I want this for my JavaFX application as well. And I don't know how to google for that. All I found was JavaFX' MenuBar, what unfortunately is not what I'm looking for.
You need to set a system property in order to move it out from your JFrame:
System.setProperty("apple.laf.useScreenMenuBar", "true");
This will show your JMenuBar in the MacOS Toolbar.
Or you could check if you are running MacOS and then set the property:
if (System.getProperty("os.name").contains("Mac")) {
System.setProperty("apple.laf.useScreenMenuBar", "true");
}
public class SystemTray {
private static final Logger logger = LogManager.getLogger(Main.class);
public static java.awt.SystemTray tray = java.awt.SystemTray.getSystemTray(); // set up a system tray icon.
public static TrayIcon trayIcon;
public static Image trayIconImage;
public static MenuItem startRecording;
public static MenuItem stopRecording;
public static MenuItem playRecording;
public static MenuItem pauseRecording;
public static MenuItem startOver;
public static MenuItem exitItem;
final static PopupMenu popup=new PopupMenu();
public static boolean windows = Main.checkOS();
public SystemTray() {
}
public static void addAppToTray() {
try {
// ensure awt toolkit is initialized.
Toolkit.getDefaultToolkit();
URL IconPath;
// app requires system tray support, just exit if there is no support.
if (!java.awt.SystemTray.isSupported()) {
System.out.println("No system tray support, application exiting.");
return;
//Platform.exit();
}
if (windows) {
File file = new File("./resources/main/cogwheel-win.png");
// IconPath =this.getClass().getResource("cogwheel-windows.png");
IconPath =file.toURI().toURL();
}
else {
File file = new File("./resources/main/cogwheel-mac.png");
// IconPath =this.getClass().getResource("cogwheel-mac.png");
IconPath =file.toURI().toURL();
}
logger.info(IconPath.getFile().toString());
trayIconImage = ImageIO.read(IconPath);
trayIcon = new TrayIcon(trayIconImage);
startRecording = new MenuItem("Start Recording (Shift+Space)");
stopRecording = new MenuItem("Stop Recording (Shift+Space)");
playRecording = new MenuItem("Play Recording (Shift+P)");
pauseRecording = new MenuItem("Pause Recording (Shift+P)");
startOver = new MenuItem("Start Over (Shift+R)");
//openItem.addActionListener(event -> Platform.runLater(this::showStage));
// and select the exit option, this will shutdown JavaFX and remove the
// tray icon (removing the tray icon will also shut down AWT).
exitItem = new MenuItem("Quit CAD");
exitItem.addActionListener(event -> {
Platform.exit();
tray.remove(trayIcon);
});
// setup the popup menu for the application.
popup.add(startRecording);
popup.add(stopRecording);
popup.addSeparator();
popup.add(playRecording);
popup.add(pauseRecording);
popup.addSeparator();
popup.add(startOver);
popup.addSeparator();
popup.add(exitItem);
trayIcon.setPopupMenu(popup);
// add the application tray icon to the system tray.
tray.add(trayIcon);
// startRecording.addActionListener(event -> Platform.runLater(Creator::startRecording));
} catch (AWTException | IOException e) {
System.out.println("Unable to init system tray");
logger.info(e.getMessage());
}
}
}
I write apps like this a lot, and this is what I discovered as being the easiest and most effective way to use Java/FX to create an app on MacOS that only exists as an icon in the system tray.
I utilize the FXTrayIcon library to accomplish this as that library does the conversions between JavaFX and AWT quite nicely.
First I just add this to my POM file:
<dependency>
<groupId>com.dustinredmond.fxtrayicon</groupId>
<artifactId>FXTrayIcon</artifactId>
<version>3.3.0</version>
</dependency>
Then I use a Launcher class which takes advantage of what AWT can do that JavaFX cannot which is get rid of the Dock icon (not to mention still no native FX support for the system tray).
import java.awt.*;
public class Launcher {
public static void main(String[] args) {
System.setProperty("apple.awt.UIElement", "true");
Toolkit.getDefaultToolkit();
Main.main(args);
}
}
Then here is a simple Main class that is fully functional
import com.dustinredmond.fxtrayicon.FXTrayIcon;
import javafx.application.Application;
import javafx.stage.Stage;
import java.net.URL;
public class Main extends Application {
private URL icon = Main.class.getResource("icon.png");
#Override public void start(Stage primaryStage) throws Exception {
new FXTrayIcon.Builder(primaryStage, icon, 22, 22)
.menuItem("Say Hello", e->helloIcon())
.separator()
.addExitMenuItem("Exit", e-> System.exit(0))
.show()
.build();
}
private void helloIcon() {
System.out.println("Hello Icon");
}
public static void main(String[] args) {
launch(args);
}
}
This is what it looks like, and no Dock icon at all nor does the app show up in the CMD+TAB app switching.
I've found an example in Oracle docs about SplashScreen. the problem is in this example the link of the image used here is passed as argument in the command line.
I'm trying to change the code so the link is written inside and I don't need to use the command line.
methode setImageURL(URL imageURL) should be able to do the work for me, but it's not accepting my argument (parameter).
I read about URL class, seems like it needs protocol! protocol like http and ftp ? if that's the case, how should my url be for files in my computer ? when I try to put a link from my computer (ex: "C:\plash.gif") it says illege excape character
I even tried to use http link for an image but it give me this error within the URL line:
non-static method setImageURL(URL) cannot be referenced from a static context
here's the code:
package misc;
import java.awt.*;
import java.awt.event.*;
import java.net.URL;
public class SplashDemo extends Frame implements ActionListener {
static void renderSplashFrame(Graphics2D g, int frame) {
final String[] comps = {"foo", "bar", "baz"};
g.setComposite(AlphaComposite.Clear);
g.fillRect(120,140,200,40);
g.setPaintMode();
g.setColor(Color.BLACK);
g.drawString("Loading "+comps[(frame/5)%3]+"...", 120, 150);
}
public SplashDemo() {
super("SplashScreen demo");
setSize(300, 200);
setLayout(new BorderLayout());
Menu m1 = new Menu("File");
MenuItem mi1 = new MenuItem("Exit");
m1.add(mi1);
mi1.addActionListener(this);
this.addWindowListener(closeWindow);
MenuBar mb = new MenuBar();
setMenuBar(mb);
mb.add(m1);
URL link= new URL("http://docs.oracle.com/javase/tutorial/uiswing/examples/misc/SplashDemoProject/src/misc/images/splash.gif");
SplashScreen.setImageURL(link);
final SplashScreen splash = SplashScreen.getSplashScreen();
if (splash == null) {
System.out.println("SplashScreen.getSplashScreen() returned null");
return;
}
Graphics2D g = splash.createGraphics();
if (g == null) {
System.out.println("g is null");
return;
}
for(int i=0; i<100; i++) {
renderSplashFrame(g, i);
splash.update();
try {
Thread.sleep(90);
}
catch(InterruptedException e) {
}
}
splash.close();
setVisible(true);
toFront();
}
public void actionPerformed(ActionEvent ae) {
System.exit(0);
}
private static WindowListener closeWindow = new WindowAdapter(){
public void windowClosing(WindowEvent e){
e.getWindow().dispose();
}
};
public static void main (String args[]) {
SplashDemo test = new SplashDemo();
}
}
this is the output:
Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - unreported exception java.net.MalformedURLException; must be caught or declared to be thrown
at misc.SplashDemo.main(SplashDemo.java:103)
Java Result: 1
BUILD SUCCESSFUL (total time: 4 seconds)
and nothing happens.
P.S: I'm a very beginner with Java, I'm using NetBeans IDE 7.2.1
The splash screen can be displayed at application startup, before the Java Virtual Machine (JVM) starts.
The splash screen window is closed automatically as soon as the first window is displayed by Swing/AWT (may be also closed manually using the Java API, see below).
If your application is packaged in a jar file, you can use the
SplashScreen-Image option in a manifest file to show a splash screen.
Place the image in the jar archive and specify the path in the option.
The path should not have a leading slash.
For example, in the manifest.mf file:
Manifest-Version: 1.0
Main-Class: Test
SplashScreen-Image: filename.gif
The SplashScreen class provides the API for controlling the splash screen.
This class may be used to
close the splash screen
change the splash screen image
get the splash screen native window position/size
paint in the splash screen.
It cannot be used to create the splash screen.
This class cannot be instantiated.
Only a single instance of this class can exist, and it may be obtained by using the getSplashScreen() static method.
In case the splash screen has not been created at application startup via the command line or manifest file option,
the getSplashScreen method returns null.
so what is wrong with your code?
NOT
SplashScreen.setImageURL(link);
OK
splash.setImageURL(link);
wrong sequence : Setting ImageUrl before you have a splash Object
URL link= new URL("http://docs.oracle.com/javase/tutorial/uiswing/examples/misc/SplashDemoProject/src/misc/images/splash.gif");
SplashScreen.setImageURL(link);
final SplashScreen splash = SplashScreen.getSplashScreen();
correct : Get splash and then set ImageUrl
short
final SplashScreen splash = SplashScreen.getSplashScreen();
splash.setImageURL(link);
long with catch MalformedURLException to get rid of the error
MalformedURLException : must be caught
final SplashScreen splash = SplashScreen.getSplashScreen();
if (splash == null) {
System.out.println("SplashScreen.getSplashScreen() returned null");
return;
}
URL link;
try {
link = new URL("http://docs.oracle.com/javase/tutorial/uiswing/examples/misc/SplashDemoProject/src/misc/images/splash.gif");
} catch (MalformedURLException ex) {
System.out.println("MalformedURLException link:77");
return;
}
try {
splash.setImageURL(link);
} catch (NullPointerException | IOException | IllegalStateException ex) {
System.out.println("NullPointer or IO or IllegalState setImageUrl:85");
return;
}
To recognize the difference between the local image file and the image file on the internet . I have made a local blue splash.gif file.
The proceeding is as follows.
Local image is loaded. (SplashScreen-Image option in the manifest file)
Internet image is loaded. (//docs.oracle.com...images/splash.gif)
Application appears.
To get it to work in Netbeans
and not always get the error SplashScreen.getSplashScreen() returned null
final SplashScreen splash = SplashScreen.getSplashScreen();
if (splash == null) {
System.out.println("SplashScreen.getSplashScreen() returned null");
you must do the following.
in properties point to your local .gif file : -splash:src/misc/images/splash.gif
So what I want is when my program runs (It's a system tray) one of those small notification problems show up at the bottom right of the screen. I tried.
trayIcon = new TrayIcon(image, "Title", popup);
trayIcon.setImageAutoSize(true);
trayIcon.displayMessage("Title", "MESSAGE HERE", TrayIcon.MessageType.ERROR) //THIS IS THE LINE THAT SHOULD SHOW THE MESSAGE
Where should it be for it to run when the program runs and is that the correct method with the correct parameters?
Have you had a read on How to Use the System Tray?
However
Check this minimal example:
After tray.add(trayIcon); than show your message.
import java.awt.AWTException;
import java.awt.Graphics2D;
import java.awt.SystemTray;
import java.awt.TrayIcon;
import java.awt.image.BufferedImage;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.SwingUtilities;
public class Test {
public Test() throws Exception {
initComponents();
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
#Override
public void run() {
try {
new Test();
} catch (Exception ex) {
ex.printStackTrace();
}
}
});
}
private void initComponents() throws Exception {
createAndShowTray();
}
private void createAndShowTray() throws Exception {
//Check the SystemTray is supported
if (!SystemTray.isSupported()) {
System.out.println("SystemTray is not supported");
return;
}
//retieve icon form url and scale it to 32 x 32
final TrayIcon trayIcon = new TrayIcon(resizeImage(ImageIO.read(
new URL("http://www.optical-illusions.in/illusions/blue_rotation_optical_illusion.jpg")), BufferedImage.TYPE_INT_ARGB, 32, 32));
//get the system tray
final SystemTray tray = SystemTray.getSystemTray();
try {
tray.add(trayIcon);
} catch (AWTException e) {
System.out.println("TrayIcon could not be added.");
}
trayIcon.displayMessage("Title", "MESSAGE HERE", TrayIcon.MessageType.ERROR); //THIS IS THE LINE THAT SHOULD SHOW THE MESSAGE
}
private static BufferedImage resizeImage(BufferedImage originalImage, int type, int IMG_WIDTH, int IMG_HEIGHT) {
BufferedImage resizedImage = new BufferedImage(IMG_WIDTH, IMG_HEIGHT, type);
Graphics2D g = resizedImage.createGraphics();
g.drawImage(originalImage, 0, 0, IMG_WIDTH, IMG_HEIGHT, null);
g.dispose();
return resizedImage;
}
}
Go to the little action center and click "manage notificaitons"
then scroll down in the settings until you get to the
It didn't work when I had it in a loop so I just tried putting an additional statement outside the loop and then it worked. Yay!
How can I continuously capture images from a webcam?
I want to experiment with object recognition (by maybe using java media framework).
I was thinking of creating two threads
one thread:
Node 1: capture live image
Node 2: save image as "1.jpg"
Node 3: wait 5 seconds
Node 4: repeat...
other thread:
Node 1: wait until image is captured
Node 2: using the "1.jpg" get colors
from every pixle
Node 3: save data in arrays
Node 4: repeat...
This JavaCV implementation works fine.
Code:
import org.bytedeco.javacv.*;
import org.bytedeco.opencv.opencv_core.IplImage;
import java.io.File;
import static org.bytedeco.opencv.global.opencv_core.cvFlip;
import static org.bytedeco.opencv.helper.opencv_imgcodecs.cvSaveImage;
public class Test implements Runnable {
final int INTERVAL = 100;///you may use interval
CanvasFrame canvas = new CanvasFrame("Web Cam");
public Test() {
canvas.setDefaultCloseOperation(javax.swing.JFrame.EXIT_ON_CLOSE);
}
public void run() {
new File("images").mkdir();
FrameGrabber grabber = new OpenCVFrameGrabber(0); // 1 for next camera
OpenCVFrameConverter.ToIplImage converter = new OpenCVFrameConverter.ToIplImage();
IplImage img;
int i = 0;
try {
grabber.start();
while (true) {
Frame frame = grabber.grab();
img = converter.convert(frame);
//the grabbed frame will be flipped, re-flip to make it right
cvFlip(img, img, 1);// l-r = 90_degrees_steps_anti_clockwise
//save
cvSaveImage("images" + File.separator + (i++) + "-aa.jpg", img);
canvas.showImage(converter.convert(img));
Thread.sleep(INTERVAL);
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
Test gs = new Test();
Thread th = new Thread(gs);
th.start();
}
}
There is also post on configuration for JavaCV
You can modify the code and be able to save the images in regular interval and do rest of the processing you want.
Some time ago I've created generic Java library which can be used to take pictures with a PC webcam. The API is very simple, not overfeatured, can work standalone, but also supports additional webcam drivers like OpenIMAJ, JMF, FMJ, LTI-CIVIL, etc, and some IP cameras.
Link to the project is https://github.com/sarxos/webcam-capture
Example code (take picture and save in test.jpg):
Webcam webcam = Webcam.getDefault();
webcam.open();
BufferedImage image = webcam.getImage();
ImageIO.write(image, "JPG", new File("test.jpg"));
It is also available in Maven Central Repository or as a separate ZIP which includes all required dependencies and 3rd party JARs.
JMyron is very simple for use.
http://webcamxtra.sourceforge.net/
myron = new JMyron();
myron.start(imgw, imgh);
myron.update();
int[] img = myron.image();
Here is a similar question with some - yet unaccepted - answers. One of them mentions FMJ as a java alternative to JMF.
This kind of goes off of gt_ebuddy's answer using JavaCV, but my video output is at a much higher quality then his answer. I've also added some other random improvements (such as closing down the program when ESC and CTRL+C are pressed, and making sure to close down the resources the program uses properly).
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.image.BufferedImage;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
import com.googlecode.javacv.CanvasFrame;
import com.googlecode.javacv.OpenCVFrameGrabber;
import com.googlecode.javacv.cpp.opencv_core.IplImage;
public class HighRes extends JComponent implements Runnable {
private static final long serialVersionUID = 1L;
private static CanvasFrame frame = new CanvasFrame("Web Cam");
private static boolean running = false;
private static int frameWidth = 800;
private static int frameHeight = 600;
private static OpenCVFrameGrabber grabber = new OpenCVFrameGrabber(0);
private static BufferedImage bufImg;
public HighRes()
{
// setup key bindings
ActionMap actionMap = frame.getRootPane().getActionMap();
InputMap inputMap = frame.getRootPane().getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
for (Keys direction : Keys.values())
{
actionMap.put(direction.getText(), new KeyBinding(direction.getText()));
inputMap.put(direction.getKeyStroke(), direction.getText());
}
frame.getRootPane().setActionMap(actionMap);
frame.getRootPane().setInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW, inputMap);
// setup window listener for close action
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
stop();
}
});
}
public static void main(String... args)
{
HighRes webcam = new HighRes();
webcam.start();
}
#Override
public void run()
{
try
{
grabber.setImageWidth(frameWidth);
grabber.setImageHeight(frameHeight);
grabber.start();
while (running)
{
final IplImage cvimg = grabber.grab();
if (cvimg != null)
{
// cvFlip(cvimg, cvimg, 1); // mirror
// show image on window
bufImg = cvimg.getBufferedImage();
frame.showImage(bufImg);
}
}
grabber.stop();
grabber.release();
frame.dispose();
}
catch (Exception e)
{
e.printStackTrace();
}
}
public void start()
{
new Thread(this).start();
running = true;
}
public void stop()
{
running = false;
}
private class KeyBinding extends AbstractAction {
private static final long serialVersionUID = 1L;
public KeyBinding(String text)
{
super(text);
putValue(ACTION_COMMAND_KEY, text);
}
#Override
public void actionPerformed(ActionEvent e)
{
String action = e.getActionCommand();
if (action.equals(Keys.ESCAPE.toString()) || action.equals(Keys.CTRLC.toString())) stop();
else System.out.println("Key Binding: " + action);
}
}
}
enum Keys
{
ESCAPE("Escape", KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0)),
CTRLC("Control-C", KeyStroke.getKeyStroke(KeyEvent.VK_C, KeyEvent.CTRL_DOWN_MASK)),
UP("Up", KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0)),
DOWN("Down", KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0)),
LEFT("Left", KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0)),
RIGHT("Right", KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0));
private String text;
private KeyStroke keyStroke;
Keys(String text, KeyStroke keyStroke)
{
this.text = text;
this.keyStroke = keyStroke;
}
public String getText()
{
return text;
}
public KeyStroke getKeyStroke()
{
return keyStroke;
}
#Override
public String toString()
{
return text;
}
}
You can try Java Webcam SDK library also.
SDK demo applet is available at link.
I have used JMF on a videoconference application and it worked well on two laptops: one with integrated webcam and another with an old USB webcam. It requires JMF being installed and configured before-hand, but once you're done you can access the hardware via Java code fairly easily.
You can try Marvin Framework. It provides an interface to work with cameras. Moreover, it also provides a set of real-time video processing features, like object tracking and filtering.
Take a look!
Real-time Video Processing Demo:
http://www.youtube.com/watch?v=D5mBt0kRYvk
You can use the source below. Just save a frame using MarvinImageIO.saveImage() every 5 second.
Webcam video demo:
public class SimpleVideoTest extends JFrame implements Runnable{
private MarvinVideoInterface videoAdapter;
private MarvinImage image;
private MarvinImagePanel videoPanel;
public SimpleVideoTest(){
super("Simple Video Test");
videoAdapter = new MarvinJavaCVAdapter();
videoAdapter.connect(0);
videoPanel = new MarvinImagePanel();
add(videoPanel);
new Thread(this).start();
setSize(800,600);
setVisible(true);
}
#Override
public void run() {
while(true){
// Request a video frame and set into the VideoPanel
image = videoAdapter.getFrame();
videoPanel.setImage(image);
}
}
public static void main(String[] args) {
SimpleVideoTest t = new SimpleVideoTest();
t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
For those who just want to take a single picture:
WebcamPicture.java
public class WebcamPicture {
public static void main(String[] args) {
try{
MarvinVideoInterface videoAdapter = new MarvinJavaCVAdapter();
videoAdapter.connect(0);
MarvinImage image = videoAdapter.getFrame();
MarvinImageIO.saveImage(image, "./res/webcam_picture.jpg");
} catch(MarvinVideoInterfaceException e){
e.printStackTrace();
}
}
}
I used Webcam Capture API. You can download it from here
webcam = Webcam.getDefault();
webcam.open();
if (webcam.isOpen()) { //if web cam open
BufferedImage image = webcam.getImage();
JLabel imageLbl = new JLabel();
imageLbl.setSize(640, 480); //show captured image
imageLbl.setIcon(new ImageIcon(image));
int showConfirmDialog = JOptionPane.showConfirmDialog(null, imageLbl, "Image Viewer", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, new ImageIcon(""));
if (showConfirmDialog == JOptionPane.YES_OPTION) {
JFileChooser chooser = new JFileChooser();
chooser.setDialogTitle("Save Image");
chooser.setFileFilter(new FileNameExtensionFilter("IMAGES ONLY", "png", "jpeg", "jpg")); //this file extentions are shown
int showSaveDialog = chooser.showSaveDialog(this);
if (showSaveDialog == 0) { //if pressed 'Save' button
String filePath = chooser.getCurrentDirectory().toString().replace("\\", "/");
String fileName = chooser.getSelectedFile().getName(); //get user entered file name to save
ImageIO.write(image, "PNG", new File(filePath + "/" + fileName + ".png"));
}
}
}
http://grack.com/downloads/school/enel619.10/report/java_media_framework.html
Using the Player with Swing
The Player can be easily used in a Swing application as well. The following code creates a Swing-based TV capture program with the video output displayed in the entire window:
import javax.media.*;
import javax.swing.*;
import java.awt.*;
import java.net.*;
import java.awt.event.*;
import javax.swing.event.*;
public class JMFTest extends JFrame {
Player _player;
JMFTest() {
addWindowListener( new WindowAdapter() {
public void windowClosing( WindowEvent e ) {
_player.stop();
_player.deallocate();
_player.close();
System.exit( 0 );
}
});
setExtent( 0, 0, 320, 260 );
JPanel panel = (JPanel)getContentPane();
panel.setLayout( new BorderLayout() );
String mediaFile = "vfw://1";
try {
MediaLocator mlr = new MediaLocator( mediaFile );
_player = Manager.createRealizedPlayer( mlr );
if (_player.getVisualComponent() != null)
panel.add("Center", _player.getVisualComponent());
if (_player.getControlPanelComponent() != null)
panel.add("South", _player.getControlPanelComponent());
}
catch (Exception e) {
System.err.println( "Got exception " + e );
}
}
public static void main(String[] args) {
JMFTest jmfTest = new JMFTest();
jmfTest.show();
}
}
Java usually doesn't like accessing hardware, so you will need a driver program of some sort, as goldenmean said. I've done this on my laptop by finding a command line program that snaps a picture. Then it's the same as goldenmean explained; you run the command line program from your java program in the takepicture() routine, and the rest of your code runs the same.
Except for the part about reading pixel values into an array, you might be better served by saving the file to BMP, which is nearly that format already, then using the standard java image libraries on it.
Using a command line program adds a dependency to your program and makes it less portable, but so was the webcam, right?
I believe the web-cam application software which comes along with the web-cam, or you native windows webcam software can be run in a batch script(windows/dos script) after turning the web cam on(i.e. if it needs an external power supply). In the bacth script , u can add appropriate delay to capture after certain time period. And keep executing the capture command in loop.
I guess this should be possible
-AD
There's a pretty nice interface for this in processing, which is kind of a pidgin java designed for graphics. It gets used in some image recognition work, such as that link.
Depending on what you need out of it, you might be able to load the video library that's used there in java, or if you're just playing around with it you might be able to get by using processing itself.
FMJ can do this, as can the supporting library it uses, LTI-CIVIL. Both are on sourceforge.
Recommand using FMJ for multimedia relatived java app.
Try using JMyron How To Use Webcam Using Java. I think using JMyron is the easiest way to access a webcam using java. I tried to use it with a 64-bit processor, but it gave me an error. It worked just fine on a 32-bit processor, though.