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package java.lang.reflect;

WildcardType represents a wildcard type expression, such as ?, ? extends Number, or ? super Integer. 
Since:
1.5/**
 * WildcardType represents a wildcard type expression, such as
 * {@code ?}, {@code ? extends Number}, or {@code ? super Integer}.
 *
 * @since 1.5
 */
public interface WildcardType extends Type {
    
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.

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
Returns:
an array of Types representing the upper bound(s) of this
    type variable/**
     * Returns an array of {@code Type} objects representing the  upper
     * bound(s) of this type variable.  Note that if no upper bound is
     * explicitly declared, the upper bound is {@code Object}.
     *
     * <p>For each upper bound B :
     * <ul>
     *  <li>if B is a parameterized type or a type variable, it is created,
     *  (see {@link java.lang.reflect.ParameterizedType ParameterizedType}
     *  for the details of the creation process for parameterized types).
     *  <li>Otherwise, B is resolved.
     * </ul>
     *
     * @return 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
     * @throws MalformedParameterizedTypeException if any of the
     *     bounds refer to a parameterized type that cannot be instantiated
     *     for any reason
     */
    Type[] getUpperBounds();

    
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.

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
Returns:
an array of Types representing the lower bound(s) of this
    type variable/**
     * Returns an array of {@code 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 {@code null}.
     * In this case, a zero length array is returned.
     *
     * <p>For each lower bound B :
     * <ul>
     *   <li>if B is a parameterized type or a type variable, it is created,
     *  (see {@link java.lang.reflect.ParameterizedType ParameterizedType}
     *  for the details of the creation process for parameterized types).
     *   <li>Otherwise, B is resolved.
     * </ul>
     *
     * @return 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
     * @throws MalformedParameterizedTypeException if any of the
     *     bounds refer to a parameterized type that cannot be instantiated
     *     for any reason
     */
    Type[] getLowerBounds();
    // one or many? Up to language spec; currently only one, but this API
    // allows for generalization.
}