如何以编程方式将按键事件发送到Java App中的任何窗口/进程？

Question

使用Java应用程序，如何以编程方式将键事件（字母，数字，标点，箭头等）发送/触发到同一台计算机上的窗口/进程？

Answer 1

Assuming you know a position that window will be you could use java.awt.Robot

This types a in whatever window is covering 10,50 on the screen.

Robot r = new Robot();
r.mouseMove(10, 50);
r.mousePress(InputEvent.BUTTON1_MASK);
r.mouseRelease(InputEvent.BUTTON1_MASK);
r.keyPress(KeyEvent.VK_A);
r.keyRelease(KeyEvent.VK_A);

If you had one window you know to cover 10,50 another at 10,400 and another at 400, 400 then this would type xy and z in the different windows. In my testing I also needed some delays before moving to make it more reliable.

Robot r = new Robot();
r.mouseMove(10, 50);
r.mousePress(InputEvent.BUTTON1_MASK);
r.mouseRelease(InputEvent.BUTTON1_MASK);
Thread.sleep(500);
r.keyPress(KeyEvent.VK_X);
r.keyRelease(KeyEvent.VK_X);
Thread.sleep(500);
r.mouseMove(10, 400);
Thread.sleep(500);
r.mousePress(InputEvent.BUTTON1_MASK);
r.mouseRelease(InputEvent.BUTTON1_MASK);
Thread.sleep(500);
r.keyPress(KeyEvent.VK_Y);
r.keyRelease(KeyEvent.VK_Y);
Thread.sleep(500);
r.mouseMove(400, 400);
Thread.sleep(500);
r.mousePress(InputEvent.BUTTON1_MASK);
r.mouseRelease(InputEvent.BUTTON1_MASK);
r.keyPress(KeyEvent.VK_Z);
r.keyRelease(KeyEvent.VK_Z);