==== 5.10.1 ConstantValue Attribute ====

The ******ConstantValue****** attribute is a fixed-length attribute used in the attributes table of the ******field_info****** structures. A ******ConstantValue****** attribute represents the value of a final static field (compile-time constant); that is, both the **ACC_STATIC** and **ACC_FINAL** bits in the flags item of the ******field_info****** structure must be set. There can be no more than one ******ConstantValue****** attribute in the attributes table of a given ******field_info****** structure. 

The **ConstantValue** attribute has the format: 

The items of the **ConstantValue_attribute** structure are as follows: 

**attribute_name_index** 

The value of the **attribute_name_index** item must be a valid index into the ****constant_pool**** table. The ****constant_pool**** entry at that index must be a **CONSTANT_Utf8_info** ([[5.6.4_CONSTANT_Utf8| Section 5.6.4, CONSTANT_Utf8]]) structure representing the string "**ConstantValue**." 

**attribute_length** 

The value of the **attribute_length** item of a **ConstantValue_attribute** structure must be **2**. 

**constantvalue_index** 

The value of the **constantvalue_index** item must be a valid index into the ****constant_pool**** table. The ****constant_pool**** entry at that index must give the constant value represented by this attribute. 

The **constant_pool** entry must be of a type **CONSTANT_Integer** ([[5.6.3_**CONSTANT_Integer**| Section 5.6.3, **CONSTANT_Integer**]]). 

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