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  4. Shift operation by inappropriate constant

Shift operation by inappropriate constant

Last modified: 03 December 2024

Reports shift operations where the shift value is a constant outside the reasonable range.

Integer shift operations outside the range 0..31 and long shift operations outside the range 0..63 are reported. Shifting by negative or overly large values is almost certainly a coding error.

Example:

int shiftSize = 32;
// Warning: shift by 32 bits is equivalent to shift by 0 bits, so there's no shift at all.
int mask = (1 << shiftSize) - 1;

Locating this inspection

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ShiftOutOfRange
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 | Bitwise operation issues

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,

Can be installed with plugin:

Java, 243.23126