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Suspicious 'System.arraycopy()' call

Reports suspicious calls to System.arraycopy().

Such calls are suspicious when:

  • the source or destination is not of an array type

  • the source and destination are of different types

  • the copied chunk length is greater than src.length - srcPos

  • the copied chunk length is greater than dest.length - destPos

  • the ranges always intersect when the source and destination are the same array

Example:

void foo() { int[] src = new int[] { 1, 2, 3, 4 }; System.arraycopy(src, 0, src, 1, 2); // warning: Copying to the same array with intersecting ranges }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

SuspiciousSystemArraycopy
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 | Probable bugs

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