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Incompatible bitwise mask operation

Reports bitwise mask expressions which are guaranteed to evaluate to true or false.

The inspection checks the expressions of the form (var & constant1) == constant2 or (var | constant1) == constant2, where constant1 and constant2 are incompatible bitmask constants.

Example:

// Incompatible mask: as the mask ends in 00, // the result could be 0x1200 but not 0x1234 if ((mask & 0xFF00) == 0x1234) {...}

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024