Method Summary

Method Details

• equals

  boolean equals(Object obj)

  Returns true if the specified object represents an annotation that is logically equivalent to this one. In other words, returns true if the specified object is an instance of the same annotation interface as this instance, all of whose members are equal to the corresponding member of this annotation, as defined below:

  • Two corresponding primitive typed members whose values arex andy are considered equal ifx == y, unless their type isfloat ordouble.
  • Two correspondingfloat members whose values arex andy are considered equal ifFloat.valueOf(x).equals(Float.valueOf(y)). (Unlike the== operator, NaN is considered equal to itself, and0.0f unequal to-0.0f.)
  • Two correspondingdouble members whose values arex andy are considered equal ifDouble.valueOf(x).equals(Double.valueOf(y)). (Unlike the== operator, NaN is considered equal to itself, and0.0 unequal to-0.0.)
  • Two correspondingString,Class, enum, or annotation typed members whose values arex andy are considered equal ifx.equals(y). (Note that this definition is recursive for annotation typed members.)
  • Two corresponding array typed membersx andy are considered equal ifArrays.equals(x, y), for the appropriate overloading ofArrays.equals.

  Overrides:

  equals in class Object

  Parameters:

  obj - the reference object with which to compare.

  Returns:

  true if the specified object represents an annotation that is logically equivalent to this one, otherwise false

  See Also:

  • Object.hashCode()
  • HashMap

• hashCode

  int hashCode()

  Returns the hash code of this annotation.

  The hash code of an annotation is the sum of the hash codes of its members (including those with default values). The hash code of an annotation member is (127 times the hash code of the member-name as computed byString.hashCode()) XOR the hash code of the member-value. The hash code of a member-value depends on its type as defined below:

  • The hash code of a primitive valuev is equal toWrapperType.valueOf(v).hashCode(), whereWrapperType is the wrapper type corresponding to the primitive type ofv (Byte,Character,Double,Float,Integer,Long,Short, orBoolean).
  • The hash code of a string, enum, class, or annotation member-valuev is computed as by callingv.hashCode(). (In the case of annotation member values, this is a recursive definition.)
  • The hash code of an array member-value is computed by calling the appropriate overloading ofArrays.hashCode on the value. (There is one overloading for each primitive type, and one for object reference types.)

  Overrides:

  hashCode in class Object

  Returns:

  the hash code of this annotation

  See Also:

  • Object.equals(java.lang.Object)
  • System.identityHashCode(java.lang.Object)

• toString

  String toString()

  Returns a string representation of this annotation. The details of the representation are implementation-dependent, but the following may be regarded as typical:

     @com.example.Name(first="Duke", middle="of", last="Java")

  Overrides:

  toString in class Object

  Returns:

  a string representation of this annotation

• annotationType

  Class<? extendsAnnotation> annotationType()

  Returns the annotation interface of this annotation.

  API Note:

  Implementation-dependent classes are used to provide the implementations of annotations. Therefore, callinggetClass on an annotation will return an implementation-dependent class. In contrast, this method will reliably return the annotation interface of the annotation.

  Returns:

  the annotation interface of this annotation

  See Also:

  • Enum.getDeclaringClass()