If you want to download Java 64-bit or 32-bit on your Windows 11 or Windows 10 computer then follow the method mentioned here.

Download the latest 32-bit or 64-bit version of Java for Windows 10 to develop and run programs written in this language effortlessly.

Most Minecraft players need not worry because, at this point, a 64-bit operating system is standard, especially for Windows and MacOS users.

It should download the ...64 image (I assume), but the install-script addresses the 32-bit version. After bypassing these problems Lunar launcher comes up, but Java fails to start.