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

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Java, 241.18072

Last modified: 18 June 2024