WildcardType (Java SE 12 & JDK 12 )

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).
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.AnnotatedConstruct
    getAnnotation, getAnnotationMirrors, getAnnotationsByType
  - Methods declared in interface javax.lang.model.type.TypeMirror
    accept, equals, getKind, hashCode, toString

- Method Detail
  - 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