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Comparison to 'Double.NaN' or 'Float.NaN'

Reports any comparisons to Double.NaN or Float.NaN. Such comparisons are never meaningful, as NaN is not equal to anything, including itself. Use the Double.isNaN() or Float.isNaN() methods instead.


if (x == Double.NaN) {...}
if (Double.isNaN(x)) {...}

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.14841

Last modified: 12 March 2024