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Zero-length array allocation

Reports allocations of arrays with known lengths of zero.

Since array lengths in Java are non-modifiable, it is almost always possible to share zero-length arrays, rather than repeatedly allocate new ones. Such sharing may provide useful optimizations in the program runtime or footprint.

Note that the inspection does not report zero-length arrays allocated as static final fields, since those arrays are assumed to be used for implementing array sharing.

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin:

Java, 241.16690

Last modified: 29 April 2024