Whenever I program in C/C++ (or any other lower level language), I tend to be self-contained with my code, never using the WinAPI and relying on libraries like SDL, so I'm not well-versed on how these system-level functions work. If you want to venture into the land of natives and using hooks (maybe you don't have to go that deeply), maybe start here. If you set the parameter in tOpacity(0.0f) from 0.0f to something between 0 and 1, you'll see that the cursor actually changes. Here's the code sample I made to test it: JFrame frame = new JFrame() įtSize(1920, 1080) // set the sizeįtLocationRelativeTo(null) // center the windowįtUndecorated(true) // make it so the frame is a basic rectangle, no topbar or outline.įtAlwaysOnTop(true) // make it so the frame is on topįtOpacity(0.0f) // make the frame transparent.įtCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR)) So, this becomes more of a lower-level (most likely C/C++) question rather than a Java question.

However, according to the Windows Documentation, setting the cursor is based on a specific event, so we'd need control which events get passed through. Now, the definition of the tOpacity states this is platform-dependent behavior, but it's specifically about how MouseEvents are handled, not how the mouse cursor is handled. Inspired from this answer, you can make a fully transparent window that passes events through to the windows behind them. However, it's also important to touch on a method I thought would work, but doesn't appear to work on my system, being a 64-bit Windows 10 Pro. This is largely operating system dependent, but I would like to think that, for security reasons, setting the global cursor is blocked on most, if not all, secure operating systems. For a direct (as best as I can) answer to the question asked, no, you can not set the global cursor using Java.

Mouse cursor icon png