Question

i’m converting a c++ header to java and the following does not work.
opstring is a string and alumacOP is a string array. opindex is an int.

opstring = alumacOP[opindex][(op >> 11) & 3 == 3]; //code does not work.

this does not work for some reason. it’s not the algorithm, but eclipse saying that ‘&’ is not defined for types boolean and int.

so my question is: Why does logical AND reference only Boolean values in java? because this works:

boolean boola,boolb;
if(boola & boolb)
  return;

but not this (eclipse still throws an error:

int x = 9, y = 8;
for(int i = 0; i < 100; i++)
  if(x & y = i)
    return;

Answer 1

It depends on operator precedence.

opstring = alumacOP[opindex][(((op >> 11) & 3) == 3)?1:0];

is what you want. (note the parenthesis around &, and the ?: to convert bool to int.