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Instances of classes with blank final fields, before they are Is meaningful only during deserialization or reconstruction of IllegalAccessException unless setAccessible(true)Īnd the field is non-static.

If the underlying field is final, the method throws an If the specified object argument is notĪn instance of the class or interface declaring the underlying Specified object argument is null, the method throws a Otherwise the underlying field is an instance field. If the underlying field is static, the obj argument is Value is automatically unwrapped if the underlying field has a Specified object argument to the specified new value. Sets the field represented by this Field object on the getBoolean public boolean getBoolean( Object obj).ExceptionInInitializerError - if the initialization provoked NullPointerException - if the specified object is nullĪnd the field is an instance field. IllegalArgumentException - if the specified object is not anįield (or a subclass or implementor thereof). Is enforcing Java language access control and the underlyingįield is inaccessible. Object before being returned Throws: IllegalAccessException - if this Field object Obj primitive values are wrapped in an appropriate To be extracted Returns: the value of the represented field in object Parameters: obj - object from which the represented field's value is The field's value is obtained according to the preceding rules. If the field is hidden in the type of obj, Is wrapped in an object before being returned, otherwise it is If the field has a primitive type, the value Otherwise, the value is retrieved from the underlying instance If the underlying field is static, the class that declared theįield is initialized if it has not already been initialized. The underlying field is inaccessible, the method throws an If this Field object is enforcing Java language access control, and Instance of the class or interface declaring the underlyingįield, the method throws an IllegalArgumentException. Specified obj argument is null, the method throws a Otherwise, the underlying field is an instance field. If the underlying field is a static field, the obj argument The underlying field's value is obtained as follows: Returns the value of the field represented by this Field, on