程序包 java.lang.reflect

接口 WildcardType

所有超级接口:

Type

public interface WildcardType
extends Type

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

从以下版本开始:

1.5

方法概要

限定符和类型	方法	说明
Type[]	getLowerBounds()	Returns an array of Type objects representing the lower bound(s) of this type variable.
Type[]	getUpperBounds()	Returns an array of Type objects representing the upper bound(s) of this type variable.

从接口继承的方法 java.lang.reflect.Type

getTypeName

方法详细资料

getUpperBounds

Type[] getUpperBounds()

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

返回:

an array of Types representing the upper bound(s) of this type variable

抛出:

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

getLowerBounds

Type[] getLowerBounds()

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

返回:

an array of Types representing the lower bound(s) of this type variable

抛出:

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