Never trust a file labeled "Minecraft Java Edition 1.16.5 Final APK" from a pop-up ad. Your device’s security is worth more than a free game.

Java Edition is built for Windows, macOS, and Linux using the Java programming language. Android runs on a different framework (Dalvik/ART). You cannot simply download a .apk file of "Java Edition 1.16.5" and install it like a normal mobile game.

There is no official, legitimate way to run Minecraft: Java Edition directly on an Android device as a standard APK file.