I don't why this post is downvoted. My cynical reply to yours: "No, this isn't a scientific approach. It is the tin-foil hat HN approach!"

You clearly don't know how Swing or Eclipse SWT works under the hood.

Java's big strength is that it's a memory safe, compiled, and sandboxed low level platform with over a quarter century of development behind it. But it historically hasn't handled computer graphics well and can feel very slow and bloated when something needs that - like a GUI. That weakness is probably a big reason why Microsoft rewrote Minecraft after they bought it.