See: Description
| Enum | Description | 
|---|---|
| LiteralKind | Specifies kinds of literal trees. | 
| TypeKind | Specifies kinds of types. | 
| TypeUseLocation | Specifies the locations to which a  DefaultQualifierannotation applies. | 
| Annotation Type | Description | 
|---|---|
| AnnotatedFor | Indicates that this class has been annotated for the given type system. | 
| CFComment | This annotation is for comments related to the Checker Framework. | 
| ConditionalPostconditionAnnotation | A meta-annotation that indicates that an annotation E is a conditional postcondition annotation,
 i.e., E is a type-specialized version of  EnsuresQualifierIforEnsuresQualifierIf.List. | 
| Covariant | A marker annotation, written on a class declaration, that signifies that one or more of the
 class's type parameters can be treated covariantly. | 
| DefaultFor | A meta-annotation applied to the declaration of a type qualifier specifies that the given
 annotation should be the default for. | 
| DefaultQualifier | Applied to a declaration of a package, type, method, variable, etc., specifies that the given
 annotation should be the default. | 
| DefaultQualifier.List | A wrapper annotation that makes the  DefaultQualifierannotation repeatable. | 
| DefaultQualifierForUse | Declaration annotation applied to type declarations to specify the qualifier to be added to
 unannotated uses of the type. | 
| DefaultQualifierInHierarchy | Indicates that the annotated qualifier is the default qualifier in the qualifier hierarchy: it
 applies if the programmer writes no explicit qualifier and no other default has been specified
 for the location. | 
| EnsuresQualifier | A postcondition annotation to indicate that a method ensures that certain expressions have a
 certain type qualifier once the method has successfully terminated. | 
| EnsuresQualifier.List | A wrapper annotation that makes the  EnsuresQualifierannotation repeatable. | 
| EnsuresQualifierIf | A conditional postcondition annotation to indicate that a method ensures that certain expressions
 have a certain qualifier once the method has terminated, and if the result is as indicated by
  result. | 
| EnsuresQualifierIf.List | A wrapper annotation that makes the  EnsuresQualifierIfannotation repeatable. | 
| FieldInvariant | Specifies that a field's type, in the class on which this annotation is written, is a subtype of
 its declared type. | 
| FromByteCode | If a method is annotated with this declaration annotation, then its signature is not written in a
 stub file and the method is not declared in source. | 
| FromStubFile | If a method is annotated with this declaration annotation, then its signature was read from a
 stub file. | 
| IgnoreInWholeProgramInference | This annotation can be used two ways: | 
| InheritedAnnotation | A meta-annotation that specifies if an annotation should be inherited. | 
| InvisibleQualifier | A meta-annotation indicating that an annotation is a type qualifier that should not be visible in
 output. | 
| JavaExpression | An annotation to use on an element of a dependent type qualifier to specify which elements of the
 annotation should be interpreted as Java expressions. | 
| MonotonicQualifier | A meta-annotation that indicates that a qualifier indicates that an expression goes monotonically
 from a type qualifier  Tto another qualifierS. | 
| NoDefaultQualifierForUse | Declaration annotation applied to type declarations to specify that the annotation on the type
 declaration should not be applied to unannotated uses of the type. | 
| PolymorphicQualifier | A meta-annotation that indicates that an annotation is a polymorphic type qualifier. | 
| PostconditionAnnotation | A meta-annotation that indicates that an annotation E is a postcondition annotation, i.e., E is a
 type-specialized version of  EnsuresQualifieror ofEnsuresQualifier.List. | 
| PreconditionAnnotation | A meta-annotation that indicates that an annotation R is a precondition annotation, i.e., R is a
 type-specialized version of  RequiresQualifier. | 
| QualifierArgument | An annotation to use on an element of a contract annotation to indicate that the element
 specifies the value of an argument of the qualifier. | 
| QualifierForLiterals | A meta-annotation that indicates what qualifier should be given to literals. | 
| RelevantJavaTypes | An annotation on a SourceChecker subclass to specify which Java types are processed by the
 checker. | 
| RequiresQualifier | A precondition annotation to indicate that a method requires certain expressions to have a
 certain qualifier at the time of the call to the method. | 
| RequiresQualifier.List | A wrapper annotation that makes the  RequiresQualifierannotation repeatable. | 
| StubFiles | An annotation on a SourceChecker subclass to provide additional stub files that should be used in
 addition to  jdk.astub. | 
| SubtypeOf | A meta-annotation to specify all the qualifiers that the given qualifier is an immediate subtype
 of. | 
| TargetLocations | A meta-annotation that restricts the type-use locations where a type qualifier may be written. | 
| Unused | Declares that the field may not be accessed if the receiver is of the specified qualifier type
 (or any supertype). | 
| UpperBoundFor | A meta-annotation applied to the declaration of a type qualifier specifies that the given
 annotation should be upper bound for. | 
They may serve as documentation for the type qualifiers, and aid the Checker Framework to infer the relations between the type qualifiers.