Using Java to send key combinations
27,939
Solution 1
The simple answer is yes. Basically, you need to wrap the keyPress/Release
of the Alt around the other keyPress/Release
s
public class TestRobotKeys {
private Robot robot;
public static void main(String[] args) {
new TestRobotKeys();
}
public TestRobotKeys() {
try {
robot = new Robot();
robot.setAutoDelay(250);
robot.keyPress(KeyEvent.VK_ALT);
robot.keyPress(KeyEvent.VK_1);
robot.keyRelease(KeyEvent.VK_1);
robot.keyPress(KeyEvent.VK_2);
robot.keyRelease(KeyEvent.VK_2);
robot.keyPress(KeyEvent.VK_3);
robot.keyRelease(KeyEvent.VK_4);
robot.keyRelease(KeyEvent.VK_ALT);
} catch (AWTException ex) {
ex.printStackTrace();
}
}
}
Solution 2
For sending keys combination using java.awt.Robot the following code works fine for me
import java.awt.AWTException;
import java.awt.Robot;
import java.awt.event.KeyEvent;
public class VirtualKeyBoard extends Robot
{
public VirtualKeyBoard() throws AWTException
{
super();
}
public void pressKeys(String keysCombination) throws IllegalArgumentException
{
for (String key : keysCombination.split("\\+"))
{
try
{ System.out.println(key);
this.keyPress((int) KeyEvent.class.getField("VK_" + key.toUpperCase()).getInt(null));
} catch (IllegalAccessException e)
{
e.printStackTrace();
}catch(NoSuchFieldException e )
{
throw new IllegalArgumentException(key.toUpperCase()+" is invalid key\n"+"VK_"+key.toUpperCase() + " is not defined in java.awt.event.KeyEvent");
}
}
}
public void releaseKeys(String keysConbination) throws IllegalArgumentException
{
for (String key : keysConbination.split("\\+"))
{
try
{ // KeyRelease method inherited from java.awt.Robot
this.keyRelease((int) KeyEvent.class.getField("VK_" + key.toUpperCase()).getInt(null));
} catch (IllegalAccessException e)
{
e.printStackTrace();
}catch(NoSuchFieldException e )
{
throw new IllegalArgumentException(key.toUpperCase()+" is invalid key\n"+"VK_"+key.toUpperCase() + " is not defined in java.awt.event.KeyEvent");
}
}
}
public static void main(String[] args) throws AWTException
{
VirtualKeyBoard kb = new VirtualKeyBoard();
String keyCombination = "control+a"; // select all text on screen
//String keyCombination = "shift+a+1+c"; // types A!C on screen
// For your case
//String keyCombination = "alt+1+2+3";
kb.pressKeys(keyCombination);
kb.releaseKeys(keyCombination);
}
}
Author by
Muhammad Khan
Updated on July 05, 2022Comments
-
Muhammad Khan almost 2 years
As per this previous link (How to send keyboard outputs) Java can simulate a key being pressed using the Robot class. However, how could a combination of key presses be simulated? If I wanted to send the combination "alt-123" would this be possible using Robot?