Mega Code Archive
Using Robot to capture a screen shapshot
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/*
This program is a part of the companion code for Core Java 8th ed.
(http://horstmann.com/corejava)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.awt.AWTException;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
/**
* @version 1.03 2007-06-12
* @author Cay Horstmann
*/
public class RobotTest {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
// make frame with a button panel
ButtonFrame frame = new ButtonFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
// attach a robot to the screen device
GraphicsEnvironment environment = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice screen = environment.getDefaultScreenDevice();
try {
Robot robot = new Robot(screen);
runTest(robot);
} catch (AWTException e) {
e.printStackTrace();
}
}
});
}
/**
* Runs a sample test procedure
*
* @param robot
* the robot attached to the screen device
*/
public static void runTest(Robot robot) {
// simulate a space bar press
robot.keyPress(' ');
robot.keyRelease(' ');
// simulate a tab key followed by a space
robot.delay(2000);
robot.keyPress(KeyEvent.VK_TAB);
robot.keyRelease(KeyEvent.VK_TAB);
robot.keyPress(' ');
robot.keyRelease(' ');
// simulate a mouse click over the rightmost button
robot.delay(2000);
robot.mouseMove(200, 50);
robot.mousePress(InputEvent.BUTTON1_MASK);
robot.mouseRelease(InputEvent.BUTTON1_MASK);
// capture the screen and show the resulting image
robot.delay(2000);
BufferedImage image = robot.createScreenCapture(new Rectangle(0, 0, 400, 300));
ImageFrame frame = new ImageFrame(image);
frame.setVisible(true);
}
}
/**
* A frame to display a captured image
*/
class ImageFrame extends JFrame {
/**
* @param image
* the image to display
*/
public ImageFrame(Image image) {
setTitle("Capture");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
JLabel label = new JLabel(new ImageIcon(image));
add(label);
}
public static final int DEFAULT_WIDTH = 450;
public static final int DEFAULT_HEIGHT = 350;
}
/*
* This program is a part of the companion code for Core Java 8th ed.
* (http://horstmann.com/corejava)
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* A panel with three buttons
*
* @version 1.32 2004-05-11
* @author Cay Horstmann
*/
class ButtonPanel extends JPanel {
public ButtonPanel() {
// create buttons
JButton yellowButton = new JButton("Yellow");
JButton blueButton = new JButton("Blue");
JButton redButton = new JButton("Red");
// add buttons to panel
add(yellowButton);
add(blueButton);
add(redButton);
// create button actions
ColorAction yellowAction = new ColorAction(Color.YELLOW);
ColorAction blueAction = new ColorAction(Color.BLUE);
ColorAction redAction = new ColorAction(Color.RED);
// associate actions with buttons
yellowButton.addActionListener(yellowAction);
blueButton.addActionListener(blueAction);
redButton.addActionListener(redAction);
}
/**
* An action listener that sets the panel's background color.
*/
private class ColorAction implements ActionListener {
public ColorAction(Color c) {
backgroundColor = c;
}
public void actionPerformed(ActionEvent event) {
setBackground(backgroundColor);
}
private Color backgroundColor;
}
}
/*
* This program is a part of the companion code for Core Java 8th ed.
* (http://horstmann.com/corejava)
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* A frame with a button panel
*
* @version 1.31 2004-05-11
* @author Cay Horstmann
*/
class ButtonFrame extends JFrame {
public ButtonFrame() {
setTitle("ButtonTest");
setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
// add panel to frame
ButtonPanel panel = new ButtonPanel();
add(panel);
}
public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;
}
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