java.lang.Object
- com.alibaba.nacos.common.packagescan.classreading.Symbol

```
abstract class Symbol
extends java.lang.Object
```
Copy from ASM, with less modifications An entry of the constant pool, of the BootstrapMethods attribute, or of the (ASM specific) type table of a class.

作者:

Eric Bruneton

另请参阅:

JVMS 4.4, JVMS 4.7.23

字段概要

字段
修饰符和类型	字段	说明
`(专用程序包) static int`	`BOOTSTRAP_METHOD_TAG`	The tag value of the BootstrapMethods attribute entries.
`(专用程序包) static int`	`CONSTANT_CLASS_TAG`	The tag value of CONSTANT_Class_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_DOUBLE_TAG`	The tag value of CONSTANT_Double_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_DYNAMIC_TAG`	The tag value of CONSTANT_Dynamic_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_FIELDREF_TAG`	The tag value of CONSTANT_Fieldref_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_FLOAT_TAG`	The tag value of CONSTANT_Float_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_INTEGER_TAG`	The tag value of CONSTANT_Integer_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_INTERFACE_METHODREF_TAG`	The tag value of CONSTANT_InterfaceMethodref_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_INVOKE_DYNAMIC_TAG`	The tag value of CONSTANT_InvokeDynamic_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_LONG_TAG`	The tag value of CONSTANT_Long_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_METHOD_HANDLE_TAG`	The tag value of CONSTANT_MethodHandle_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_METHOD_TYPE_TAG`	The tag value of CONSTANT_MethodType_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_METHODREF_TAG`	The tag value of CONSTANT_Methodref_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_MODULE_TAG`	The tag value of CONSTANT_Module_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_NAME_AND_TYPE_TAG`	The tag value of CONSTANT_NameAndType_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_PACKAGE_TAG`	The tag value of CONSTANT_Package_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_STRING_TAG`	The tag value of CONSTANT_String_info JVMS structures.
`(专用程序包) static int`	`CONSTANT_UTF8_TAG`	The tag value of CONSTANT_Utf8_info JVMS structures.
`(专用程序包) long`	`data`	The numeric value of this symbol.
`(专用程序包) int`	`index`	The index of this symbol in the constant pool, in the BootstrapMethods attribute, or in the (ASM specific) type table of a class (depending on the `tag` value).
`(专用程序包) int`	`info`	Additional information about this symbol, generally computed lazily.
`(专用程序包) static int`	`MERGED_TYPE_TAG`	The tag value of a merged type entry in the (ASM specific) type table of a class.
`(专用程序包) java.lang.String`	`name`	The name of the class field or method corresponding to this symbol.
`(专用程序包) java.lang.String`	`owner`	The internal name of the owner class of this symbol.
`(专用程序包) int`	`tag`	A tag indicating the type of this symbol.
`(专用程序包) static int`	`TYPE_TAG`	The tag value of a normal type entry in the (ASM specific) type table of a class.
`(专用程序包) static int`	`UNINITIALIZED_TYPE_TAG`
`(专用程序包) java.lang.String`	`value`	The string value of this symbol.

构造器概要

构造器
构造器	说明
`Symbol(int index, int tag, java.lang.String owner, java.lang.String name, java.lang.String value, long data)`	Constructs a new Symbol.

方法概要
- 从类继承的方法 java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - CONSTANT_CLASS_TAG
```
static final int CONSTANT_CLASS_TAG
```
    The tag value of CONSTANT_Class_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_FIELDREF_TAG
```
static final int CONSTANT_FIELDREF_TAG
```
    The tag value of CONSTANT_Fieldref_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_METHODREF_TAG
```
static final int CONSTANT_METHODREF_TAG
```
    The tag value of CONSTANT_Methodref_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_INTERFACE_METHODREF_TAG
```
static final int CONSTANT_INTERFACE_METHODREF_TAG
```
    The tag value of CONSTANT_InterfaceMethodref_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_STRING_TAG
```
static final int CONSTANT_STRING_TAG
```
    The tag value of CONSTANT_String_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_INTEGER_TAG
```
static final int CONSTANT_INTEGER_TAG
```
    The tag value of CONSTANT_Integer_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_FLOAT_TAG
```
static final int CONSTANT_FLOAT_TAG
```
    The tag value of CONSTANT_Float_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_LONG_TAG
```
static final int CONSTANT_LONG_TAG
```
    The tag value of CONSTANT_Long_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_DOUBLE_TAG
```
static final int CONSTANT_DOUBLE_TAG
```
    The tag value of CONSTANT_Double_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_NAME_AND_TYPE_TAG
```
static final int CONSTANT_NAME_AND_TYPE_TAG
```
    The tag value of CONSTANT_NameAndType_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_UTF8_TAG
```
static final int CONSTANT_UTF8_TAG
```
    The tag value of CONSTANT_Utf8_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_METHOD_HANDLE_TAG
```
static final int CONSTANT_METHOD_HANDLE_TAG
```
    The tag value of CONSTANT_MethodHandle_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_METHOD_TYPE_TAG
```
static final int CONSTANT_METHOD_TYPE_TAG
```
    The tag value of CONSTANT_MethodType_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_DYNAMIC_TAG
```
static final int CONSTANT_DYNAMIC_TAG
```
    The tag value of CONSTANT_Dynamic_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_INVOKE_DYNAMIC_TAG
```
static final int CONSTANT_INVOKE_DYNAMIC_TAG
```
    The tag value of CONSTANT_InvokeDynamic_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_MODULE_TAG
```
static final int CONSTANT_MODULE_TAG
```
    The tag value of CONSTANT_Module_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - CONSTANT_PACKAGE_TAG
```
static final int CONSTANT_PACKAGE_TAG
```
    The tag value of CONSTANT_Package_info JVMS structures.
    
    另请参阅:
    
    常量字段值
  - BOOTSTRAP_METHOD_TAG
```
static final int BOOTSTRAP_METHOD_TAG
```
    The tag value of the BootstrapMethods attribute entries.
    
    另请参阅:
    
    常量字段值
  - TYPE_TAG
```
static final int TYPE_TAG
```
    The tag value of a normal type entry in the (ASM specific) type table of a class.
    
    另请参阅:
    
    常量字段值
  - UNINITIALIZED_TYPE_TAG
```
static final int UNINITIALIZED_TYPE_TAG
```
    另请参阅:
    
    常量字段值
  - MERGED_TYPE_TAG
```
static final int MERGED_TYPE_TAG
```
    The tag value of a merged type entry in the (ASM specific) type table of a class.
    
    另请参阅:
    
    常量字段值
  - index
```
final int index
```
    The index of this symbol in the constant pool, in the BootstrapMethods attribute, or in the (ASM specific) type table of a class (depending on the tag value).
  - tag
```
final int tag
```
    A tag indicating the type of this symbol. Must be one of the static tag values defined in this class.
  - owner
```
final java.lang.String owner
```
    The internal name of the owner class of this symbol. Only used for CONSTANT_FIELDREF_TAG, CONSTANT_METHODREF_TAG, CONSTANT_INTERFACE_METHODREF_TAG, and CONSTANT_METHOD_HANDLE_TAG symbols.
  - name
```
final java.lang.String name
```
    The name of the class field or method corresponding to this symbol. Only used for CONSTANT_FIELDREF_TAG, CONSTANT_METHODREF_TAG, CONSTANT_INTERFACE_METHODREF_TAG, CONSTANT_NAME_AND_TYPE_TAG, CONSTANT_METHOD_HANDLE_TAG, CONSTANT_DYNAMIC_TAG and CONSTANT_INVOKE_DYNAMIC_TAG symbols.
  - value
```
final java.lang.String value
```
    The string value of this symbol. This is:
    
    a field or method descriptor for CONSTANT_FIELDREF_TAG, CONSTANT_METHODREF_TAG, CONSTANT_INTERFACE_METHODREF_TAG, CONSTANT_NAME_AND_TYPE_TAG, CONSTANT_METHOD_HANDLE_TAG, CONSTANT_METHOD_TYPE_TAG, CONSTANT_DYNAMIC_TAG and CONSTANT_INVOKE_DYNAMIC_TAG symbols,
    an arbitrary string for CONSTANT_UTF8_TAG and CONSTANT_STRING_TAG symbols,
    an internal class name for CONSTANT_CLASS_TAG, TYPE_TAG and UNINITIALIZED_TYPE_TAG symbols,
    null for the other types of symbol.
  - data
```
final long data
```
    The numeric value of this symbol. This is:
    
    the symbol's value for CONSTANT_INTEGER_TAG,CONSTANT_FLOAT_TAG, CONSTANT_LONG_TAG, CONSTANT_DOUBLE_TAG,
    the CONSTANT_MethodHandle_info reference_kind field value for CONSTANT_METHOD_HANDLE_TAG symbols,
    the CONSTANT_InvokeDynamic_info bootstrap_method_attr_index field value for CONSTANT_INVOKE_DYNAMIC_TAG symbols,
    the offset of a bootstrap method in the BootstrapMethods boostrap_methods array, for CONSTANT_DYNAMIC_TAG or BOOTSTRAP_METHOD_TAG symbols,
    the bytecode offset of the NEW instruction that created an type for UNINITIALIZED_TYPE_TAG symbols,
    the indices (in the class' type table) of two TYPE_TAG source types for MERGED_TYPE_TAG symbols,
    0 for the other types of symbol.
  - info
```
int info
```
    Additional information about this symbol, generally computed lazily. Warning: the value of this field is ignored when comparing Symbol instances (to avoid duplicate entries in a SymbolTable). Therefore, this field should only contain data that can be computed from the other fields of this class. It contains:
    
    the Type#getArgumentsAndReturnSizes of the symbol's method descriptor for CONSTANT_METHODREF_TAG, CONSTANT_INTERFACE_METHODREF_TAG and CONSTANT_INVOKE_DYNAMIC_TAG symbols,
    the index in the InnerClasses_attribute 'classes' array (plus one) corresponding to this class, for CONSTANT_CLASS_TAG symbols,
    the index (in the class' type table) of the merged type of the two source types for MERGED_TYPE_TAG symbols,
    0 for the other types of symbol, or if this field has not been computed yet.
- 构造器详细资料
  - Symbol
```
Symbol(int index,
       int tag,
       java.lang.String owner,
       java.lang.String name,
       java.lang.String value,
       long data)
```
    Constructs a new Symbol. This constructor can't be used directly because the Symbol class is abstract. Instead, use the factory methods of the class.
    
    参数:
    
    index - the symbol index in the constant pool, in the BootstrapMethods attribute, or in the (ASM specific) type table of a class (depending on 'tag').
    
    tag - the symbol type. Must be one of the static tag values defined in this class.
    
    owner - The internal name of the symbol's owner class. Maybe null.
    
    name - The name of the symbol's corresponding class field or method. Maybe null.
    
    value - The string value of this symbol. Maybe null.
    
    data - The numeric value of this symbol.

类 Symbol

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

CONSTANT_CLASS_TAG

CONSTANT_FIELDREF_TAG

CONSTANT_METHODREF_TAG

CONSTANT_INTERFACE_METHODREF_TAG

CONSTANT_STRING_TAG

CONSTANT_INTEGER_TAG

CONSTANT_FLOAT_TAG

CONSTANT_LONG_TAG

CONSTANT_DOUBLE_TAG

CONSTANT_NAME_AND_TYPE_TAG

CONSTANT_UTF8_TAG

CONSTANT_METHOD_HANDLE_TAG

CONSTANT_METHOD_TYPE_TAG

CONSTANT_DYNAMIC_TAG

CONSTANT_INVOKE_DYNAMIC_TAG

CONSTANT_MODULE_TAG

CONSTANT_PACKAGE_TAG

BOOTSTRAP_METHOD_TAG

TYPE_TAG

UNINITIALIZED_TYPE_TAG

MERGED_TYPE_TAG

index

tag

owner

name

value

data

info

构造器详细资料

Symbol