Reports expressions and conditions that always produce the same result, like true, false, null, or zero. Such expressions could be replaced with the corresponding constant value. Very often though they signal about a bug in the code.
The inspection behavior may be controlled by a number of annotations, such as nullability annotations,
<a href="https://www.jetbrains.com/help/idea/contract-annotations.html">@Contract</a> annotation,
@Range annotation and so on.
Configure the inspection:
Use the Don't report assertions with condition statically proven to be always true option to avoid reporting assertions that were statically proven to be always true. This also includes conditions like
if (alwaysFalseCondition) throw new IllegalArgumentException();.
Use the Ignore assert statements option to control how the inspection treats
assertstatements. By default, the option is disabled, which means that the assertions are assumed to be executed (-ea mode). If the option is enabled, the assertions will be completely ignored (-da mode).
Use the Warn when constant is stored in variable option to display warnings when variable is used, whose value is known to be a constant.
Before IntelliJ IDEA 2022.3, this inspection was part of "Constant Conditions & Exceptions" inspection. Now, it split into two inspections: "Constant Values" and "Nullability and data flow problems".
Don't report assertions with condition statically proven to be always true
Ignore assert statements
Warn when constant is stored in variable
IntelliJ IDEA 2023.3, Qodana for JVM 2023.3