capture Screen - Java Swing

Java examples for Swing:Screen

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Description

capture Screen

Demo Code


import java.awt.AWTException;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.apache.log4j.Logger;

public class Main{
    private static final Logger logger = Logger.getLogger(ScreenUtil.class);
    public static void captureScreen(final File file, final String fileType) {
        try {/*from w  ww  .  ja va2 s .com*/
            final boolean isCaptured = captureScreenToClipBoard();
            file.getParentFile().mkdirs();
            try {
                Thread.sleep(500);
            } catch (final InterruptedException e) {
            }
            if (isCaptured) {
                final Image image = getClipboard();
                saveImageToFile(image, file, fileType);
            }
        } catch (Exception e) {
            System.out.println(e);
        }
    }
    public static boolean captureScreenToClipBoard() {
        try {
            Robot robot = null;
            try {
                robot = new Robot();
            } catch (final AWTException e) {
                logger.error("Could not get Robot");
                return false;
            }
            robot.keyPress(KeyEvent.VK_ALT);
            robot.keyPress(KeyEvent.VK_PRINTSCREEN);
            robot.keyRelease(KeyEvent.VK_PRINTSCREEN);
            robot.keyRelease(KeyEvent.VK_ALT);
            logger.debug("Screen captured into clipboard");
            return true;
        } catch (Exception e) {
            System.out.println(e);
            return false;
        }
    }
    public static Image getClipboard() {
        final Transferable trans = Toolkit.getDefaultToolkit()
                .getSystemClipboard().getContents(null);
        Image image = null;
        try {
            if (trans != null
                    && trans.isDataFlavorSupported(DataFlavor.imageFlavor)) {
                image = (Image) trans
                        .getTransferData(DataFlavor.imageFlavor);
            }
        } catch (final UnsupportedFlavorException e) {
            image = null;
        } catch (final IOException e) {
            image = null;
        }
        return image;
    }
    private static void saveImageToFile(final Image image, final File file,
            final String fileType) {
        try {
            final BufferedImage bufferedImage = toBufferedImage(image);
            ImageIO.write(bufferedImage, fileType, file);
        } catch (final IOException e) {
            System.out.println("Write error for " + file.getPath() + ": "
                    + e.getMessage());
        }
    }
    private static BufferedImage toBufferedImage(final Image src) {
        final int w = src.getWidth(null);
        final int h = src.getHeight(null);
        final int type = BufferedImage.TYPE_INT_RGB;
        final BufferedImage dest = new BufferedImage(w, h, type);
        final Graphics2D g2 = dest.createGraphics();
        g2.drawImage(src, 0, 0, null);
        g2.dispose();
        return dest;
    }
}

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