Java: Pressing ENTER key with Robot Class doesn't work

Question

r.keyPress(KeyEvent.VK_ENTER);
r.keyRelease(KeyEvent.VK_ENTER);

It doesn't work for some reason. When I click ENTER manually, it does work. How to fix this?

Are there certain dialogs when it's required to press it manually? Because a few dialogs before this issue occurs, clicking ENTER with the robot works fine. So, seems to be a special dialog?!

Are there "special dialogs"? If, how to automatically ENTER click then on these?

---

On Windows 7 and 10.

EDIT:

The whole code down below.

Robot r = new Robot();

            r.keyPress(KeyEvent.VK_SHIFT);
            r.keyPress(KeyEvent.VK_F10);
            r.keyRelease(KeyEvent.VK_F10);
            r.keyRelease(KeyEvent.VK_SHIFT);

            r.keyPress(KeyEvent.VK_DOWN);
            r.keyRelease(KeyEvent.VK_DOWN);
            r.keyPress(KeyEvent.VK_DOWN);
            r.keyRelease(KeyEvent.VK_DOWN);
            r.keyPress(KeyEvent.VK_DOWN);
            r.keyRelease(KeyEvent.VK_DOWN);

            r.keyPress(KeyEvent.VK_ENTER);
            r.keyRelease(KeyEvent.VK_ENTER);
            // ABOVE ENTER WORKS FINE! THEN A NEW WINDOW IS OPENED

            // HERE IT STOPS WORKING!
            r.keyPress(KeyEvent.VK_ENTER);
            r.keyRelease(KeyEvent.VK_ENTER);

            r.keyPress(KeyEvent.VK_ENTER);
            r.keyRelease(KeyEvent.VK_ENTER);

            r.keyPress(KeyEvent.VK_ENTER);
            r.keyRelease(KeyEvent.VK_ENTER);

            r.keyPress(KeyEvent.VK_DOWN);
            r.keyRelease(KeyEvent.VK_DOWN);

Where I put the command it stops working.

Right before that command, there's a new window opened. Now, maybe the next ENTERs aren't recognized anymore 'cause there's no focus?

But, I don't think so. Because when I click ENTER manually (without clicking anything else or moving the mouse), it does work. So apparently the focus is there.

Answer 1

From the Java Tutorial: "For a key press to affect a component, thecomponent must have the keyboard focus ".

Set the focus on the component you wish to detect keyPress events like this:

component.requestFocusInWindow();

In your case, you may want to detect the window opening event and then set focus.