@NotNull/@Nullable problems

Reports problems related to nullability annotations.

Examples:

• Overriding methods are not annotated:

  abstract class A { @NotNull abstract String m(); } class B extends A { String m() { return "empty string"; } }

• Annotated primitive types: @NotNull int myFoo;

• Both @Nullable and @NotNull are present on the same member: @Nullable @NotNull String myFooString;

• Collection of nullable elements is assigned into a collection of non-null elements:

  void testList(List<@Nullable String> nullableList) { List<@NotNull String> list2 = nullableList; }

Use the Configure Annotations button to specify nullability annotations and the checkboxes to fine-tune where the inspection should provide warnings.

This inspection only reports if the language level of the project or module is 5 or higher, and nullability annotations are available on the classpath.