Using Robot to capture a screen shapshot
/* 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 */publicclass RobotTest { publicstaticvoid main(String[] args) { EventQueue.invokeLater(new Runnable() { publicvoid 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 */publicstaticvoid 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); } publicstaticfinalint DEFAULT_WIDTH = 450; publicstaticfinalint 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. */privateclass ColorAction implements ActionListener { public ColorAction(Color c) { backgroundColor = c; } publicvoid 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); } publicstaticfinalint DEFAULT_WIDTH = 300; publicstaticfinalint DEFAULT_HEIGHT = 200; } Related examples in the same category
