NullableProblems

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.