Type

All Superinterfaces:

AnnotationTarget

All Known Subinterfaces:

ArrayType, ClassType, ParameterizedType, PrimitiveType, TypeVariable, VoidType, WildcardType
```
public interface Type
extends AnnotationTarget
```
A type is used in a program source code, but does not have to be declared anywhere.
For example, the int type exists even if it is not declared in any Java source file, while the java.lang.String type is declared by the class of the same name. Array types, such as int[] or String[][], are not declared anywhere either, but their element types may be. A generic class, such as java.util.List, declares a raw type of the same name, but it does not declare the parameterized types, such as List<String>. Parameterized types are created by applying type arguments to generic classes. For example, the List<String> type is created by applying String to List<T>.
Types occur on many places. A field has a type, a method has a return type, a method parameter has a type, even the extends clause in a class declaration contains a type. Occurences of types may be annotated.
Types are:
- the void pseudo-type
- a primitive type, such as int
- a class type, such as String
- an array type, such as int[] or String[][]
- a parameterized type, such as List<String>
- a type variable, such as T when used in a class that declares a type parameter T
- a wildcard type, such as the type argument in List<? extends Number>
Class types and parameterized types allow obtaining their class declarations.

Nested Class Summary

Nested Classes
Modifier and Type Interface and Description

static class Type.Kind

Nested Classes
Modifier and Type	Interface and Description
`static class`	`Type.Kind`

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`default ArrayType`	`asArray()` Returns this type as an array type.
`default ClassType`	`asClass()` Returns this type as a class type.
`default DeclarationInfo`	`asDeclaration()` Returns this annotation target as a declaration.
`default ParameterizedType`	`asParameterizedType()` Returns this type as a parameterized type.
`default PrimitiveType`	`asPrimitive()` Returns this type as a primitive type.
`default Type`	`asType()` Returns this annotation target as a type.
`default TypeVariable`	`asTypeVariable()` Returns this type as a type variable.
`default VoidType`	`asVoid()` Returns this type as the void pseudo-type.
`default WildcardType`	`asWildcardType()` Returns this type as a wildcard type.
`default boolean`	`isArray()` Returns whether this type is an array type.
`default boolean`	`isClass()` Returns whether this type is a class type.
`default boolean`	`isDeclaration()` Returns whether this annotation target is a declaration.
`default boolean`	`isParameterizedType()` Returns whether this type is a parameterized type.
`default boolean`	`isPrimitive()` Returns whether this type is a primitive type.
`default boolean`	`isType()` Returns whether this annotation target is a type.
`default boolean`	`isTypeVariable()` Returns whether this type is a type variable.
`default boolean`	`isVoid()` Returns whether this type is the void pseudo-type.
`default boolean`	`isWildcardType()` Returns whether this type is a wildcard type.
`Type.Kind`	`kind()` Returns the kind of this type.

Methods inherited from interface jakarta.enterprise.lang.model.AnnotationTarget
annotation, annotations, annotations, hasAnnotation, hasAnnotation, repeatableAnnotation

- Method Detail
  - isDeclaration
```
default boolean isDeclaration()
```
    Description copied from interface: AnnotationTarget
    
    Returns whether this annotation target is a declaration.
    
    Specified by:
    
    isDeclaration in interface AnnotationTarget
    
    Returns:
    
    true if this is a declaration, false otherwise
  - isType
```
default boolean isType()
```
    Description copied from interface: AnnotationTarget
    
    Returns whether this annotation target is a type.
    
    Specified by:
    
    isType in interface AnnotationTarget
    
    Returns:
    
    true if this is a type, false otherwise
  - asDeclaration
```
default DeclarationInfo asDeclaration()
```
    Description copied from interface: AnnotationTarget
    
    Returns this annotation target as a declaration.
    
    Specified by:
    
    asDeclaration in interface AnnotationTarget
    
    Returns:
    
    this declaration, never null
  - asType
```
default Type asType()
```
    Description copied from interface: AnnotationTarget
    
    Returns this annotation target as a type.
    
    Specified by:
    
    asType in interface AnnotationTarget
    
    Returns:
    
    this type, never null
  - kind
```
Type.Kind kind()
```
    Returns the kind of this type.
    
    Returns:
    
    the kind of this type
  - isVoid
```
default boolean isVoid()
```
    Returns whether this type is the void pseudo-type.
    
    Returns:
    
    true if this is void, false otherwise
  - isPrimitive
```
default boolean isPrimitive()
```
    Returns whether this type is a primitive type.
    
    Returns:
    
    true if this is a primitive type, false otherwise
  - isClass
```
default boolean isClass()
```
    Returns whether this type is a class type.
    
    Returns:
    
    true if this is a class type, false otherwise
  - isArray
```
default boolean isArray()
```
    Returns whether this type is an array type.
    
    Returns:
    
    true if this is an array type, false otherwise
  - isParameterizedType
```
default boolean isParameterizedType()
```
    Returns whether this type is a parameterized type.
    
    Returns:
    
    true if this is a parameterized type, false otherwise
  - isTypeVariable
```
default boolean isTypeVariable()
```
    Returns whether this type is a type variable. Type variables are also used to represent type parameters in declarations of parameterized types.
    
    Returns:
    
    true if this is a primitive type, false otherwise
  - isWildcardType
```
default boolean isWildcardType()
```
    Returns whether this type is a wildcard type.
    
    Returns:
    
    true if this is a wildcard type, false otherwise
  - asVoid
```
default VoidType asVoid()
```
    Returns this type as the void pseudo-type.
    
    Returns:
    
    this void type, never null
    
    Throws:
    
    java.lang.IllegalStateException - if isVoid() returns false
  - asPrimitive
```
default PrimitiveType asPrimitive()
```
    Returns this type as a primitive type.
    
    Returns:
    
    this primitive type, never null
    
    Throws:
    
    java.lang.IllegalStateException - if isPrimitive() returns false
  - asClass
```
default ClassType asClass()
```
    Returns this type as a class type.
    
    Returns:
    
    this class type, never null
    
    Throws:
    
    java.lang.IllegalStateException - if isClass() returns false
  - asArray
```
default ArrayType asArray()
```
    Returns this type as an array type.
    
    Returns:
    
    this array type, never null
    
    Throws:
    
    java.lang.IllegalStateException - if isArray() returns false
  - asParameterizedType
```
default ParameterizedType asParameterizedType()
```
    Returns this type as a parameterized type.
    
    Returns:
    
    this parameterized type, never null
    
    Throws:
    
    java.lang.IllegalStateException - if isParameterizedType() returns false
  - asTypeVariable
```
default TypeVariable asTypeVariable()
```
    Returns this type as a type variable. Type variables are also used to represent type parameters in declarations of parameterized types.
    
    Returns:
    
    this type variable, never null
    
    Throws:
    
    java.lang.IllegalStateException - if isTypeVariable() returns false
  - asWildcardType
```
default WildcardType asWildcardType()
```
    Returns this type as a wildcard type.
    
    Returns:
    
    this wildcard type, never null
    
    Throws:
    
    java.lang.IllegalStateException - if isWildcardType() returns false

Interface Type

Nested Class Summary

Method Summary

Methods inherited from interface jakarta.enterprise.lang.model.AnnotationTarget

Method Detail

isDeclaration

isType

asDeclaration

asType

kind

isVoid

isPrimitive

isClass

isArray

isParameterizedType

isTypeVariable

isWildcardType

asVoid

asPrimitive

asClass

asArray

asParameterizedType

asTypeVariable

asWildcardType