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Added in API level 1

public interface WildcardType
implements Type

java.lang.reflect.WildcardType

WildcardType表示一个通配符型表达，如 ? ， ? extends Number ，或 ? super Integer 。

Public methods
`abstract Type[]`	`getLowerBounds()` 返回表示此类型变量下限的 `Type`对象的数组。
`abstract Type[]`	`getUpperBounds()` 返回表示此类型变量上限的 `Type`对象的数组。

Added in API level 1

Type[] getLowerBounds ()

返回表示此类型变量下限的Type对象数组。请注意，如果没有明确声明下限，则下限是null的类型。在这种情况下，返回一个零长度的数组。

对于每个下限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

Added in API level 1

Type[] getUpperBounds ()

返回表示此类型变量上限的Type对象的数组。请注意，如果没有明确声明上限，则上限为Object 。

对于每个上限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