Use of variable whose value is known to be constant

Reports any usages of variables which are known to be constant.

This is the case if the (read) use of the variable is surrounded by an if, while, or for statement with an == condition which compares the variable with a constant. In this case, the use of a variable which is known to be constant can be replaced with an actual constant.

Example:

    private static void foo(double number) {
        if (number == 1.0) {
            f(number);
        }
    }
    private static void f(double number) {}

After the quick-fix is applied:

    private static void foo(double number) {
        if (number == 1.0) {
            f(1.0);
        }
    }
    private static void f(double number) {}

Locating this inspection

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.

ConstantValueVariableUse

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | Java | Data flow

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection ConstantValueVariableUse

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025