[英]Simulate a key held down in Java
I'm looking to simulate the action of holding a keyboard key down for a short period of time in Java. 我正在寻找模拟在Java中短按键盘键的动作。 I would expect the following code to hold down the A key for 5 seconds, but it only presses it once (produces a single 'a', when testing in Notepad).
我希望下面的代码按住A键5秒钟,但是只按一次它(在记事本中测试时会产生一个“ a”)。 Any idea if I need to use something else, or if I'm just using the awt.Robot class wrong here?
我是否需要使用其他东西,或者我在这里使用awt.Robot类错了吗?
Robot robot = null;
robot = new Robot();
robot.keyPress(KeyEvent.VK_A);
Thread.sleep(5000);
robot.keyRelease(KeyEvent.VK_A);
Thread.sleep() stops the current thread (the thread that is holding down the key) from executing. Thread.sleep()阻止当前线程(按住键的线程)执行。
If you want it to hold the key down for a given amount of time, maybe you should run it in a parallel Thread. 如果您希望它在给定的时间内按住键,也许您应该在并行线程中运行它。
Here is a suggestion that will get around the Thread.sleep() issue (uses the command pattern so you can create other commands and swap them in and out at will): 这是一个解决Thread.sleep()问题的建议(使用命令模式,以便您可以创建其他命令并随意交换它们):
public class Main {
public static void main(String[] args) throws InterruptedException {
final RobotCommand pressAKeyCommand = new PressAKeyCommand();
Thread t = new Thread(new Runnable() {
public void run() {
pressAKeyCommand.execute();
}
});
t.start();
Thread.sleep(5000);
pressAKeyCommand.stop();
}
}
class PressAKeyCommand implements RobotCommand {
private volatile boolean isContinue = true;
public void execute() {
try {
Robot robot = new Robot();
while (isContinue) {
robot.keyPress(KeyEvent.VK_A);
}
robot.keyRelease(KeyEvent.VK_A);
} catch (AWTException ex) {
// Do something with Exception
}
}
public void stop() {
isContinue = false;
}
}
interface RobotCommand {
void execute();
void stop();
}
Just keep pressing? 只是一直按?
import java.awt.Robot;
import java.awt.event.KeyEvent;
public class PressAndHold {
public static void main( String [] args ) throws Exception {
Robot robot = new Robot();
for( int i = 0 ; i < 10; i++ ) {
robot.keyPress( KeyEvent.VK_A );
}
}
}
I think the answer provided by edward will do!! 我认为爱德华提供的答案会的!
There is no keyDown event in java.lang.Robot. java.lang.Robot中没有keyDown事件。 I tried this on my computer (testing on a console under linux instead of with notepad) and it worked, producing a string of a's.
我在我的计算机上尝试了此操作(在Linux下而不是使用记事本在控制台上进行测试),它可以正常工作,并产生一个字符串a。 Perhaps this is just a problem with NotePad?
也许这只是NotePad的问题?
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