What is the difference between & and && in Java?

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& <– verifies both operands
&& <– stops evaluating if the first operand evaluates to false since the result will be false

(x != 0) & (1/x > 1) <– this means evaluate (x != 0) then evaluate (1/x > 1) then do the &. the problem is that for x=0 this will throw an exception.

(x != 0) && (1/x > 1) <– this means evaluate (x != 0) and only if this is true then evaluate (1/x > 1) so if you have x=0 then this is perfectly safe and won’t throw any exception if (x != 0) evaluates to false the whole thing directly evaluates to false without evaluating the (1/x > 1).

EDIT:

exprA | exprB <– this means evaluate exprA then evaluate exprB then do the |.

exprA || exprB <– this means evaluate exprA and only if this is false then evaluate exprB and do the ||.

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