Javac quirks

Reports known Javac issues, performance problems, and incompatibilities. For example, type inference may be slow when it has to process many nested calls.

The following code triggers a warning, as the vararg method call has 50+ poly arguments:

  Arrays.asList(
      Arrays.asList("a1", "b1"),
      Arrays.asList("a2", "b2"),
      ...
      Arrays.asList("a100", "b100"));

The quick-fix adds explicit type arguments, which makes compilation and IDE processing much faster:

  //noinspection RedundantTypeArguments
  Arrays.<List<String>>asList(
      Arrays.asList("a1", "b1"),
      Arrays.asList("a2", "b2"),
      ...
      Arrays.asList("a100", "b100"));

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.

JavacQuirks

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 | Compiler issues

Inspection ID: JavacQuirks

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 JavacQuirks

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