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  4. Reference checked for 'null' is not used inside 'if'

Reference checked for 'null' is not used inside 'if'

Last modified: 03 December 2024

Reports references to variables that are checked for nullability in the condition of an if statement or conditional expression but not used inside that if statement.

Usually this either means that the check is unnecessary or that the variable is not referenced inside the if statement by mistake.

Example:

void test(Integer i) {
  if (i != null) { // here 'i' is not used inside 'if' statement
    System.out.println();
  }
}

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VariableNotUsedInsideIf
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Inspection Details

By default bundled with:

IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,

Can be installed with plugin:

Java, 243.23126