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Showing content from https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/constant/ClassDesc.html below:

ClassDesc (Java SE 17 & JDK 17)

All Superinterfaces:: ConstantDesc, TypeDescriptor, TypeDescriptor.OfField<ClassDesc>

Since:

See Also:

ConstantDescs

Nested Class Summary
Method Summary
Returns a
ClassDesc
for an array type whose component type is described by this
ClassDesc
.

Returns a
ClassDesc
for an array type of the specified rank, whose component type is described by this
ClassDesc
.

Returns the component type of this
ClassDesc
, if it describes an array type, or
null
otherwise.

Returns a field type descriptor string for this type

Returns a human-readable name for the type described by this descriptor.

boolean

Compare the specified object with this descriptor for equality.

default boolean

Returns whether this
ClassDesc
describes an array type.

default boolean

Returns whether this
ClassDesc
describes a class or interface type.

default boolean

Returns whether this
ClassDesc
describes a primitive type.

Returns a
ClassDesc
for a nested class of the class or interface type described by this
ClassDesc
.

Returns a
ClassDesc
for a nested class of the class or interface type described by this
ClassDesc
.

Returns a
ClassDesc
for a class or interface type, given the name of the class or interface, such as
"java.lang.String"
.

Returns a
ClassDesc
for a class or interface type, given a package name and the unqualified (simple) name for the class or interface.

Returns a
ClassDesc
given a descriptor string for a class, interface, array, or primitive type.

Returns the package name of this
ClassDesc
, if it describes a class or interface type.

Method Details
- of
  
  Parameters:
  
  name - the fully qualified (dot-separated) binary class name
  
  Returns:
  
  a ClassDesc describing the desired class
  
  Throws:
  
  NullPointerException - if the argument is null
  
  IllegalArgumentException - if the name string is not in the correct format
- of
  Returns a
  ClassDesc
  for a class or interface type, given a package name and the unqualified (simple) name for the class or interface.
  
  Parameters:
  
  packageName - the package name (dot-separated); if the package name is the empty string, the class is considered to be in the unnamed package
  
  className - the unqualified (simple) class name
  
  Returns:
  
  a ClassDesc describing the desired class
  
  Throws:
  
  NullPointerException - if any argument is null
  
  IllegalArgumentException - if the package name or class name are not in the correct format
- ofDescriptor
  Returns a
  ClassDesc
  given a descriptor string for a class, interface, array, or primitive type.
  
  API Note:
  
  A field type descriptor string for a non-array type is either a one-letter code corresponding to a primitive type ("J", "I", "C", "S", "B", "D", "F", "Z", "V"), or the letter "L", followed by the fully qualified binary name of a class, followed by ";". A field type descriptor for an array type is the character "[" followed by the field descriptor for the component type. Examples of valid type descriptor strings include "Ljava/lang/String;", "I", "[I", "V", "[Ljava/lang/String;", etc. See JVMS 4.3.2 ("Field Descriptors") for more detail.
  
  Parameters:
  
  descriptor - a field descriptor string
  
  Returns:
  
  a ClassDesc describing the desired class
  
  Throws:
  
  NullPointerException - if the argument is null
  
  IllegalArgumentException - if the name string is not in the correct format
  
  See Java Virtual Machine Specification:
  
  4.3.2 Field Descriptors
  4.4.1 The CONSTANT_Class_info Structure
- arrayType
  Returns a
  ClassDesc
  for an array type whose component type is described by this
  ClassDesc
  .
  
  Specified by:
  
  arrayType in interface TypeDescriptor.OfField<ClassDesc>
  
  Returns:
  
  a ClassDesc describing the array type
  
  Throws:
  
  IllegalStateException - if the resulting ClassDesc would have an array rank of greater than 255
  
  See Java Virtual Machine Specification:
  
  4.4.1 The CONSTANT_Class_info Structure
- arrayType
  Returns a
  ClassDesc
  for an array type of the specified rank, whose component type is described by this
  ClassDesc
  .
  
  Parameters:
  
  rank - the rank of the array
  
  Returns:
  
  a ClassDesc describing the array type
  
  Throws:
  
  IllegalArgumentException - if the rank is less than or equal to zero or if the rank of the resulting array type is greater than 255
  
  See Java Virtual Machine Specification:
  
  4.4.1 The CONSTANT_Class_info Structure
- nested
  Returns a
  ClassDesc
  for a nested class of the class or interface type described by this
  ClassDesc
  .
  
  API Note:
  
  Example: If descriptor d describes the class java.util.Map, a descriptor for the class java.util.Map.Entry could be obtained by d.nested("Entry").
  
  Parameters:
  
  nestedName - the unqualified name of the nested class
  
  Returns:
  
  a ClassDesc describing the nested class
  
  Throws:
  
  NullPointerException - if the argument is null
  
  IllegalStateException - if this ClassDesc does not describe a class or interface type
  
  IllegalArgumentException - if the nested class name is invalid
- nested
  Returns a
  ClassDesc
  for a nested class of the class or interface type described by this
  ClassDesc
  .
  
  Parameters:
  
  firstNestedName - the unqualified name of the first level of nested class
  
  moreNestedNames - the unqualified name(s) of the remaining levels of nested class
  
  Returns:
  
  a ClassDesc describing the nested class
  
  Throws:
  
  NullPointerException - if any argument or its contents is null
  
  IllegalStateException - if this ClassDesc does not describe a class or interface type
  
  IllegalArgumentException - if the nested class name is invalid
- isArray
  default boolean isArray()
  
  Returns whether this
  ClassDesc
  describes an array type.
  
  Specified by:
  
  isArray in interface TypeDescriptor.OfField<ClassDesc>
  
  Returns:
  
  whether this ClassDesc describes an array type
- isPrimitive
  default boolean isPrimitive()
  
  Returns whether this
  ClassDesc
  describes a primitive type.
  
  Specified by:
  
  isPrimitive in interface TypeDescriptor.OfField<ClassDesc>
  
  Returns:
  
  whether this ClassDesc describes a primitive type
- isClassOrInterface
  default boolean isClassOrInterface()
  
  Returns whether this
  ClassDesc
  describes a class or interface type.
  
  Returns:
  
  whether this ClassDesc describes a class or interface type
- componentType
  Returns the component type of this
  ClassDesc
  , if it describes an array type, or
  null
  otherwise.
  
  Specified by:
  
  componentType in interface TypeDescriptor.OfField<ClassDesc>
  
  Returns:
  
  a ClassDesc describing the component type, or null if this descriptor does not describe an array type
- packageName
  Returns the package name of this
  ClassDesc
  , if it describes a class or interface type.
  
  Returns:
  
  the package name, or the empty string if the class is in the default package, or this ClassDesc does not describe a class or interface type
- displayName
  Returns a human-readable name for the type described by this descriptor.
  
  Implementation Requirements:
  
  The default implementation returns the simple name (e.g., int) for primitive types, the unqualified class name for class or interface types, or the display name of the component type suffixed with the appropriate number of [] pairs for array types.
  
  Returns:
  
  the human-readable name
- descriptorString
  Returns a field type descriptor string for this type
  
  Specified by:
  
  descriptorString in interface TypeDescriptor
  
  Returns:
  
  the descriptor string
  
  See Java Virtual Machine Specification:
  
  4.3.2 Field Descriptors
- equals
  Compare the specified object with this descriptor for equality. Returns
  true
  if and only if the specified object is also a
  ClassDesc
  and both describe the same type.
  Overrides:
  
  equals in class Object
  
  Parameters:
  
  o - the other object
  
  Returns:
  
  whether this descriptor is equal to the other object
  
  See Also:
  - Object.hashCode()
  - HashMap

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