✎ javacard:jcvm:6.7.2_constant_instancefieldref_constant_virtualmethodref_and_constant_supermethodref [wiki]

This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong.
==== 6.7.2 CONSTANT_InstanceFieldref, CONSTANT_VirtualMethodref, and CONSTANT_SuperMethodref ====

References to instance fields, and virtual methods are represented by similar structures: 

The items in these structures are as follows: 

**tag** 

The tag item of a ****CONSTANT_InstanceFieldref**_info** structure has the value **CONSTANT_InstanceFieldref** (2). 

The tag item of a ****CONSTANT_VirtualMethodref**_info** structure has the value **CONSTANT_VirtualMethodref** (3). 

The tag item of a ****CONSTANT_SuperMethodref**_info** structure has the value **CONSTANT_SuperMethodref** (4). 

**class** 

The **class** item represents the **class** associated with the referenced instance field, virtual method, or super method invocation. It is a **class**_ref structure ([[6.7.1_CONSTANT_Classref| Section 6.7.1, CONSTANT_Classref]]). If the referenced **class** is defined in this package the high bit is equal to zero. If the reference **class** is defined in an imported package the high bit of this structure is equal to one.  

The class referenced in the **CONSTANT_InstanceField_info** structure must be the class that contains the declaration of the instance field. 

The class referenced in the **CONSTANT_VirtualMethodref_info** structure must be a class that contains a declaration or definition of the virtual method. 

The class referenced in the **CONSTANT_SuperMethodref_info** structure must be the class that defines the method that contains the Java language-level super invocation. 

**token** 

The **token** item in the **CONSTANT_InstanceFieldref_info** structure represents an instance field **token** ([[4.3.7.5_Instance Fields| Section 4.3.7.5, Instance Fields]]) of the referenced field. The value of the instance field **token** is defined within the scope of the **class** indicated by the **class** item. 

The **token** item of the **CONSTANT_VirtualMethodref_info** structure represents the virtual method **token** ([[4.3.7.6_Virtual Methods| Section 4.3.7.6, Virtual Methods]]) of the referenced method. The virtual method **token** is defined within the scope of the hierarchy of the **class** indicated by the **class** item. If the referenced method is public or protected the high bit of the **token** item is zero. If the referenced method is package-visible the high bit of the **token** item is one. In this case the **class** item must represent a reference to a **class** defined in this package. 

The **token** item of the **CONSTANT_SuperMethodref_info** structure represents the virtual method **token** ([[4.3.7.6_Virtual Methods| Section 4.3.7.6, Virtual Methods]]) of the referenced method. Unlike in the **CONSTANT_VirtualMethodref_info** structure, the virtual method **token** is defined within the scope of the hierarchy of the super****class**** of the ****class**** indicated by the ****class**** item. If the referenced method is public or protected the high bit of the **token** item is zero. If the referenced method is package-visible the high bit of the **token** item is one. In the latter case the ****class**** item must represent a reference to a ****class**** defined in this package and at least one super****class**** of the ****class**** that contains a definition of the virtual method must also be defined in this package.
User Tools

Site Tools

Page Tools
