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Interface WildcardType

All Superinterfaces:
AnnotatedConstruct, TypeMirror 
public interface WildcardType extends TypeMirror
Represents a wildcard type argument. Examples include: 

   ?
   ? extends Number
   ? super T

A wildcard may have its upper bound explicitly set by an extends clause, its lower bound explicitly set by a super clause, or neither (but not both).

See Java Language Specification:
4.5.1 Type Arguments of Parameterized Types
Since:
1.6

Method Summary

Modifier and Type Method Description
TypeMirror getExtendsBound()
Returns the upper bound of this wildcard.
TypeMirror getSuperBound()
Returns the lower bound of this wildcard.

Methods declared in interface javax.lang.model.type.TypeMirror

accept, equals, getAnnotation, getAnnotationMirrors, getAnnotationsByType, getKind, hashCode, toString

Method Details

getExtendsBound

TypeMirror getExtendsBound()
Returns the upper bound of this wildcard. If no upper bound is explicitly declared, null is returned.
Returns:
the upper bound of this wildcard

getSuperBound

TypeMirror getSuperBound()
Returns the lower bound of this wildcard. If no lower bound is explicitly declared, null is returned.
Returns:
the lower bound of this wildcard

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Documentation extracted from Debian's OpenJDK Development Kit package.
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https://docs.oracle.com/en/java/javase/21/docs/api/java.compiler/javax/lang/model/type/WildcardType.html