@Override
            public void invoke(final long window, final int codepoint) {

                final char keyChar = (char) codepoint;

                final KeyInputEvent pressed = new KeyInputEvent(KeyInput.KEY_UNKNOWN, keyChar, true, false);
                pressed.setTime(getInputTimeNanos());

                keyInputEvents.add(pressed);

                final KeyInputEvent released = new KeyInputEvent(KeyInput.KEY_UNKNOWN, keyChar, false, false);
                released.setTime(getInputTimeNanos());

                keyInputEvents.add(released);
            }
Determine the name of the specified key in the current system language.

@param jmeKey the keycode from {@link com.jme3.input.KeyInput}
@return the name of the key, or null if unknown
jme3-lwjgl3/src/main/java/com/jme3/input/lwjgl/GlfwKeyInput.java