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java.lang.reflect

Interface WildcardType

  • All Superinterfaces:
    Type

    public interface WildcardType
    extends Type
    WildcardType represents a wildcard type expression, such as ?, ? extends Number, or ? super Integer.
    Since:
    1.5
    • Method Detail

      • 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.
        Returns:
        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
      • 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.
        Returns:
        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
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