DRAFT
NumericToBooleanCoercion
Misconception:
An expression of a numeric type can be coerced to type boolean,
where 0 means false and any other value means true.
This allows conditions like int i; ... if (i) ....
Incorrect
Numeric types can be coerced to boolean
Correct
Numeric types cannot be coerced to boolean
CorrectionHere is what's right.
Here is what's right.
Java strictly separates numeric and boolean types.
There is no implicit coercion,
and there are not even explicit casts.
int i = 0;
boolean b;
b = i; // illegal (no coercion)
b = (boolean)i; // illegal castAs Section 4.2.5 of the Java Language Specification describes,
to convert a number to a boolean,
one can use comparison operators:
if (i != 0) {
...
}Language
Java