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Negative int hexadecimal constant in long context

Reports negative int hexadecimal constants in long context. Such constants are implicitly widened to long, which means their higher bits will become 1 rather than 0 (e.g., 0xFFFF_FFFF will become 0xFFFF_FFFF_FFFF_FFFFL). Unlikely this is intended, and even if it is, using an explicit long constant would be less confusing.

Example:

// Warning: this is int constant -1 which is widened to long // becoming 0xFFFF_FFFF_FFFF_FFFFL. long mask = 0xFFFF_FFFF;

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NegativeIntConstantInLongContext
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New in 2022.3

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.2, Qodana for JVM 2024.2,

Can be installed with plugin:

Java, 242.22892

Last modified: 11 September 2024