If statement that uses 3 boolean values

Question

Im trying to make an if statement like this:

if(boolean1 AND boolean2 AND boolean3 == true){
   [Do this....]
}

is there a way to do an if statement in that format or will i have to do it like this:

if(boolean1 = true & boolean2 = true ect...){}

btw: if you're in a boolean context, you never need to compare it to `== true`, and probably never should (it's just noise). So, don't do `if (a && b && c == true)`, just do `if (a && b && c)`. — yshavit, Oct 21 '15 at 18:43
Also note that a single & does a bitwise and instead of a logical one. Using & when you really mean && can range from a small performance hit to disaster, depending on the instance. — Brent C, Oct 21 '15 at 18:46
would not recommend it but `if (Stream.of(boolean1, boolean2, boolean3).allMatch(Boolean.TRUE::equals))` has semantics close to what you want. — zapl, Oct 21 '15 at 19:01

score 3 · Accepted Answer · answered Oct 21 '15 at 18:42

Least you can get is

if(boolean1 && boolean2 && boolean3 &&..){

}

Because since they are already booleans you need not to check for their value. Afaik, no other simple way.

If you have toooooooo many, create an array and write a simple util method to check if any is false

Elliott Frisch · Answer 2 · 2015-10-21T18:46:33.840

2

Yes, but you need two &(s) for logical and (one is a bitwise and). Also, one equals is assignment (you need two, or none). Something like,

if (boolean1 && boolean2 && boolean3){
    // ...
}

edited Oct 21 '15 at 18:46

answered Oct 21 '15 at 18:41

Elliott Frisch

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Actually you don't _need_ the double `&´ (bitwise AND works fine). Though sometimes more efficient. – Mattias Isegran Bergander Oct 21 '15 at 18:45
That said, `&&` is much more common, so if a peer comes across a single-`&`, they're likely to assume it's a typo and fix it for you. If you really do want single-`&` for some reason, it's probably worth adding a comment in the code. – yshavit Oct 21 '15 at 18:46
1

They are not the same: the single & will check both conditions always, the double && will stop after the first condition if it evaluates to false. – Luca S. Oct 21 '15 at 19:18

score 0 · Answer 3 · answered Oct 21 '15 at 18:42

0

There is no need to compare with true (though sometimes that can be nice for readability):

if (boolean1 && boolean2 && boolean3) {...

answered Oct 21 '15 at 18:42

Mattias Isegran Bergander

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score 0 · Answer 4 · edited May 23 '17 at 12:31

There is no syntax that will work in quite in the fashion of checking three variables or statements against a single outcome. It's important to note that && and & as logical operators do not match all normal uses of the word AND (for instance, you could not check that boolean1 AND boolean2 AND boolean3 == false with && or & operators).

That said, evaluating boolean1 == true will give the same result as just boolean1. So the tedious if statement

if(boolean1 == true & boolean2 == true & boolean3 == true){...}

can be shortened to

if(boolean1 & boolean2 & boolean3){...}

It is also probably advisable to use && instead of & unless you have a specific reason to avoid short-circuiting. See Differences in boolean operators: & vs && and | vs || for more on that topic.

If statement that uses 3 boolean values

4 Answers4