public interface WildcardType
implements Type

java.lang.reflect.WildcardType



WildcardType represents a wildcard type expression, such as ?, ? extends Number, or ? super Integer.

Summary

Public methods

abstract Type[] getLowerBounds()

Returns an array of Type objects representing the lower bound(s) of this type variable.

abstract Type[] getUpperBounds()

Returns an array of Type objects representing the upper bound(s) of this type variable.

Inherited methods

From interface java.lang.reflect.Type

default String getTypeName()

Returns a string describing this type, including information about any type parameters.

Public methods

getLowerBounds

public abstract Type[] getLowerBounds ()

Returns an array of Type objects representing the lower bound(s) of this type variable. If no lower bound is explicitly declared, the lower bound is the type of null. In this case, a zero length array is returned.

For each lower bound B :

  • if B is a parameterized type or a type variable, it is created, (see ParameterizedType for the details of the creation process for parameterized types).
  • Otherwise, B is resolved.
Returns
Type[] an array of Types representing the lower bound(s) of this type variable
Throws
TypeNotPresentException if any of the bounds refers to a non-existent type declaration
MalformedParameterizedTypeException if any of the bounds refer to a parameterized type that cannot be instantiated for any reason

getUpperBounds

public abstract Type[] getUpperBounds ()

Returns an array of Type objects representing the upper bound(s) of this type variable. If no upper bound is explicitly declared, the upper bound is Object.

For each upper bound B :

  • if B is a parameterized type or a type variable, it is created, (see ParameterizedType for the details of the creation process for parameterized types).
  • Otherwise, B is resolved.
Returns
Type[] an array of Types representing the upper bound(s) of this type variable
Throws
TypeNotPresentException if any of the bounds refers to a non-existent type declaration
MalformedParameterizedTypeException if any of the bounds refer to a parameterized type that cannot be instantiated for any reason

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Last updated 2025-02-10 UTC.