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 ID: SuspiciousSystemArraycopy

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection SuspiciousSystemArraycopy

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.3

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.3, Qodana for JVM 2025.3,

Last modified: 03 December 2025