Robot Class in Java

The robot class expands object classes. Used to generate system input events for self-running demonstrations, test automation, and other applications that require mouse and keyboard control. The main purpose of the robot class is automatic testing of Java platform conversions.

This class allows us to generate input events that are different from publishing events in the queue for abstract window (AWT) tools. For example, the Robot.mouseMove metho

040d moves the cursor and not only results in a mhjj ytdik0,lkouse movement event.

However, some platforms require special permission to access low-level input management. AWTException is raised when the current platform configuration does not allow input control when trying to create an instance of a robot. For example, a system like X-Window raises exceptions if the XTEST 2.2 standard extension is not activated (or not supported) by the X server.

If we use the robot class for purposes other than self-testing, we need to handle this error condition using an exception handling mechanism.

Java Robot objects can control users, so we have to be a little careful. For example, if we allow our Java program that uses a robot class to enter endless loops by entering keypresses, mouse clicks, and mouse movements, we will find that the only way to regain control of our system is to turn off the power switch or press the reset button to restart the computer.

The Robot class offers many methods where we can make a mouse and keyboard, just like the input provided by the user. Some of the most commonly used instance methods in the Robot class are:

createScreenCapture (rectangular screenRect)

Returns the BufferedImage reference value. This method is used to capture the screen in the specified pixel value.

mouseMove (int x, int y)

Move the mouse pointer to the specified screen coordinates.

Mouse (insert button)

Press one mouse button.

Mouse release (enter button)

To release one of the mouse buttons.

keyPress (int keycode)

 

Press certain keys on the keyboard.

keyRelease (int keycode)

How to release certain keys from the keyboard.

getPixelColor (int x, int y)

To get the pixel color in the coordinates specified on the screen.

setAutoDelay (int ms)

To set the time in milliseconds, this robot must sleep after an event is generated.

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