==== 6.13.2 field_descriptor_info ====

The **field_descriptor_info** structure is used to describe a field defined in this package: 

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

**token** 

The **token** item represents the **token** of this field. If this field is private or package-visible static field it does not have a **token** assigned. In this case the value of the **token** item must be **0xFF**. 

**access_flags** 

The ****access_flags**** item is a mask of modifiers used to describe the access permission to and properties of this field. The ****access_flags**** modifiers for fields are shown in the following table. 

Name 

Value 

ACC_PUBLIC 

0x01 

ACC_PRIVATE 

0x02 

ACC_PROTECTED 

0x04 

ACC_STATIC 

0x08 

ACC_FINAL 

0x10 

The field access and modifier flags defined in the table above are a subset of those defined for fields in a Java class file. They have the same meaning, and are set under the same conditions, as the corresponding flags in a Java class file. 

All other flag values are reserved. Their values must be zero. 

**field_ref** 

The **field_ref** item represents a reference to this field. If the **ACC_STATIC** flag is equal to 1, this item represents a static_**field_ref** as defined in the **CONSTANT_StaticFieldref** structure ([[6.7.3_**CONSTANT_StaticFieldref** and CONSTANT_StaticMethodref| Section 6.7.3, **CONSTANT_StaticFieldref** and CONSTANT_StaticMethodref]]). 

If the **ACC_STATIC** flag is equal to 0, this item represents a reference to an instance field. It contains a **class_ref** item and an instance field token item. These items are defined in the same manner as in the **CONSTANT_InstanceFieldref** structure ([[6.7.2_**CONSTANT_InstanceFieldref**_ CONSTANT_VirtualMethodref_ and CONSTANT_SuperMethodref| Section 6.7.2, **CONSTANT_InstanceFieldref**, CONSTANT_VirtualMethodref, and CONSTANT_SuperMethodref]]). 

**type** 

The **type** item indicates the **type** of this field. directly or indirectly. If this field is a primitive **type** (**boolean**, **byte**, **short**, or **int**) the high bit of this item is equal to 1, otherwise the high bit of this item is equal to 0. 

**  primitive_type** 

The ****primitive_type**** item represents the type of this field using the values in the table below. As noted above, the high bit of the ****primitive_type**** item is equal to 1. 

Data Type 

Value 

**boolean** 

**0x0002** 

**byte** 

**0x0003** 

**short** 

**0x0004** 

**int** 

**0x0005** 

**  reference_type** 

The ****reference**_type** item represents a 15-bit offset into the **type_descriptor_info** structure. The item at the offset must represent the **reference** type of this field. As noted above, the high bit of the ****reference**_type** item is equal to 0.