sjas sjas - 23 days ago 6
Java Question

Java: for(;;) vs. while(true)

What is the difference between a standard

while(true)
loop and
for(;;)
?

Is there any, or will both be mapped to the same bytecode after compiling?

Answer

Semantically, they're completely equivalent. It's a matter of taste, but I think while(true) looks cleaner, and is easier to read and understand at first glance. In Java neither of them causes compiler warnings.

At the bytecode level, it might depend on the compiler and the level of optimizations, but in principle the code emitted should be the same.

EDIT:

On my compiler, using the Bytecode Outline plugin,the bytecode for for(;;){} looks like this:

   L0
    LINENUMBER 6 L0
   FRAME SAME
    GOTO L0

And the bytecode for while(true){} looks like this:

   L0
    LINENUMBER 6 L0
   FRAME SAME
    GOTO L0

So yes, at least for me, they're identical.