Robot Class Program for Capture Screen

Here is the Program for Capturing the Screen via using the Robot Class of java.awt package

import com.sun.awt.AWTUtilities;
import java.awt.AWTException;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.MouseInfo;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.JLabel;

class InUI extends JFrame {
    int wWin;
    int hWin;
    int xWin;
    int yWin;
    InUI() {
        wWin = Toolkit.getDefaultToolkit().getScreenSize().width;
        hWin = Toolkit.getDefaultToolkit().getScreenSize().height;
        setSize(wWin, hWin);
        Point loc = MouseInfo.getPointerInfo().getLocation();
        setLocation(0, 0);
        setBackground(Color.BLACK);
        addKeyListener(new KeyDetector());
        addMouseMotionListener(new MouseMove());
        setUndecorated(true);           
        AWTUtilities.setWindowOpacity(this, 0.4f);        
        Container cont = getContentPane();
        cont.setLayout(new BorderLayout());
        JLabel lbl = new JLabel("Click and drag this capture area.
Press Enter to capture the screen and ESC for Exit.");
        lbl.setHorizontalAlignment(JLabel.CENTER);
        cont.add(lbl, BorderLayout.CENTER);
        setVisible(true);                

    }

    class KeyDetector extends KeyAdapter {
        public void keyPressed(KeyEvent e) {
            System.out.println(e.getKeyCode());
            int code = e.getKeyCode();
            if (code == 27) //exit the program when the Esc key is pressed. 
            System.exit(0);
            else if (code == 45) //minimize the capture
            minimize();
            else if (code == 91) //decrease capture area
            decreaseSize();
            else if (code == 93) //increase capture area
            increaseSize();
            else if (code == 10) { //capture the screen when Enter key is pressed
                minimize();
                capture();
            }
            else if((code==KeyEvent.VK_X) && (e.getModifiers() & KeyEvent.ALT_MASK)!=0 )
            System.exit(0);

        }
    }
    class MouseMove extends MouseMotionAdapter {@Override
        public void mouseDragged(MouseEvent e) {
            //change location of the capture area when mouse is dragged
            setWinLocation(e.getXOnScreen(), e.getYOnScreen());
        }
    }
    public void increaseSize() {
        Dimension ds = Toolkit.getDefaultToolkit().getScreenSize();
        if (wWin < ds.getWidth()) {
            wWin += 5;
            this.setSize(wWin, hWin);
        }
        if (hWin < ds.getHeight()) {
            hWin += 5;
            this.setSize(wWin, hWin);
        }

    }
    public void decreaseSize() {
        if (wWin > 5) {
            wWin -= 5;
            this.setSize(wWin, hWin);
        }
        if (hWin > 5) {
            hWin -= 5;
            this.setSize(wWin, hWin);
        }
    }
    public void setWinLocation(int x, int y) {
        xWin = x - wWin / 2;
        yWin = y - wWin / 2;
        this.setLocation(new Point(xWin, yWin));
    }
    public void minimize() {
        this.setExtendedState(JFrame.ICONIFIED);
    }
    public void capture() {
        try {
            Robot rb = new Robot();
            //capture the target part of the screen
            BufferedImage bi = rb.createScreenCapture(new Rectangle(xWin, yWin, wWin, hWin));
            //save the image
                        System.out.println(System.getProperty("user.dir"));
            ImageIO.write(bi, "png", new File(System.getProperty("user.dir") + File.separator + "image" + System.currentTimeMillis() + ".png"));
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

    }
}

public class RobotDemo {
    public static void main(String[] args) throws AWTException {
        new InUI();
    }
}