Why is C++ better for a game engine than Java?

Question

Java

Hello. I have seen discussions on this topic for a long time. There is lwjgl (light weight java game library), it gives access to OpenGL, it has a couple of engines and games. But many say that the best choice for writing an engine is C++. Why? Java generally for these purposes is not suitable? Or how :)

Answer 1

A programming language is a tool for solving problems.
Java, C, Js, Python.... they are all tools.
And just as a hammer is good for hammering nails, and a screwdriver is good for driving screws, Java is good for writing applications with powerful logic, and Js, for example, for funny pages on the Internet.
It is possible to “tighten” screws with a hammer and hammer nails with a screwdriver, but it is much more efficient to use tools for their intended purpose.
Holivars are meaningless and useless here - you should not compare Java and C ++. Nobody argues about hammers versus screwdrivers (everyone understands that a hammer is faster)). In some tasks, it is more appropriate to use Java, in some - pluses.

Answer 2

Java code runs inside the Java virtual machine.
C++ code is compiled into bytecode for direct execution by the processor.

The specifications of the bytecode and the virtual machines that execute it can vary greatly from language to language: bytecode often consists of instructions for a stack virtual machine, but register machines can also be used. However, most bytecode instructions are usually equivalent to one or more assembler instructions.
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Source: Wikipedia
Bottom line: an extra layer slows down the execution of logic in a Java application compared to C ++, but a finished Java application can be run on most devices and operating systems without additional recompilation and optimization for a specific platform.
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