Pointless arithmetic expression
Reports pointless arithmetic expressions. Such expressions include adding or subtracting zero, multiplying by zero or one, and division by one.
Such expressions may be the result of automated refactorings and they are unlikely to be what the developer intended to do.
The quick-fix simplifies such expressions.
Example:
void f(int a) {
int x = a - a;
int y = a + 0;
int res = x / x;
}
After the quick-fix is applied:
void f(int a) {
int x = 0;
int y = a;
int res = 1;
}
- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
PointlessArithmeticExpression
Note that in rare cases, the suggested replacement might not be completely equivalent to the original code for all possible inputs. For example, the inspection suggests replacing x / x
with 1
. However, if x
is zero, the original code throws ArithmeticException
or results in NaN
. Also, if x
is NaN
, then the result is also NaN
. It's very unlikely that such behavior is intended.
Here you can find the description of settings available for the Pointless arithmetic expression inspection, and the reference of their default values.
Inspection Details | |
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By default bundled with: | |
Can be installed with plugin: | Java, 243.23126 |
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