As programmers many a times we need take snap shots of our screens. If we can take snap shot in java why use OS specific way to take a snap shot?
Here is a simple code example of taking snapshot in java (Either PNG format or JPEG format):
01 import java.awt.AWTException;
02 import java.awt.Dimension;
03 import java.awt.Rectangle;
04 import java.awt.Robot;
05 import java.awt.Toolkit;
06 import java.awt.image.RenderedImage;
07 import java.io.File;
08 import java.io.IOException;
09 import javax.imageio.ImageIO;
10
11 /**
12 * A Simple program that saves current screen snapshot.
13 * Supported formats png and jpg.
14 * Usage java ScreenSnapShot <<outputfilename>>
15 *
16 * @author Kumar Mettu
17 * @version 0.61
18 */
19 public class ScreenSnapShot {
20
21 public static void main(String[] args) throws IOException,AWTException {
22
23 String saveFileName = "default.png";
24 String saveFileFormat = "png";
25
26 if (args.length > 0)
27 saveFileName = args[0];
28
29 if (saveFileName.toLowerCase().endsWith(".png")) {
30 saveFileFormat = "png";
31 } else if (saveFileName.toLowerCase().endsWith(".jpg") ||
32 saveFileName.toLowerCase().endsWith(".jpeg")) {
33 saveFileFormat = "jpg";
34 } else {
35 System.err.println("Only png and jpg formats are supported.");
36 System.exit(1);
37 }
38
39 // get current sceen size for snapshot.
40 Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
41 Rectangle screenRect = new Rectangle(screenSize);
42
43 // create current screen snapshot
44 RenderedImage image = (new Robot()).createScreenCapture(screenRect);
45
46 if (ImageIO.write(image, saveFileFormat, new File(saveFileName))) {
47 System.out.println("Screen snap shot is saved as :" + saveFileName);
48 } else {
49 System.out.println("Unable to save snap shot");
50 }
51 }
52 }
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This code requires J2SE1.4. There is no real use of this code unless you extend it to make use of it(like taking snapshots at fixed intervals etc...).
2 comments:
ThankZ !
simple and elegant.
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