You can use

javap -c <classname>

 to see the bytecode.

Equations solely consisting of compile-time constants are typically
solved before being compiled to byte code.  This is also true of
strings, so :

String s = "I want " + ((23 + 7) / 3) + " big macs";

would be stored in byte code as "I want 10 big macs".

Walter Gildersleeve
Freiburg, Germany

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Should the value of PI change, then you will need to recompile your code.

Looking at the bytecode is not a particularly good way of determining
performance. The real optimisations happen at runtime, once your code
has been run 10,000 times. So when performance counts, benchmark your
actual code in a close to real life situation.

Tom Hawtin