All Known Implementing Classes:

ObjectInputStream, ObjectOutputStream
```
public interface ObjectStreamConstants
```
A helper interface with constants used by the serialization implementation.

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`baseWireHandle`	Handle for the first object that gets serialized.
`static int`	`PROTOCOL_VERSION_1`	Stream protocol version 1.
`static int`	`PROTOCOL_VERSION_2`	Stream protocol version 2.
`static byte`	`SC_BLOCK_DATA`	Bit mask for the `flag` field in `ObjectStreamClass`.
`static byte`	`SC_ENUM`	Bit mask for the `flag` field in `ObjectStreamClass`.
`static byte`	`SC_EXTERNALIZABLE`	Bit mask for the `flag` field in `ObjectStreamClass`.
`static byte`	`SC_SERIALIZABLE`	Bit mask for the `flag` field in `ObjectStreamClass`.
`static byte`	`SC_WRITE_METHOD`	Bit mask for the `flag` field in `ObjectStreamClass`.
`static short`	`STREAM_MAGIC`	The stream header's magic number.
`static short`	`STREAM_VERSION`	The stream header's version number.
`static SerializablePermission`	`SUBCLASS_IMPLEMENTATION_PERMISSION`	Permission constant to enable subclassing of ObjectInputStream and ObjectOutputStream.
`static SerializablePermission`	`SUBSTITUTION_PERMISSION`	Permission constant to enable object substitution during serialization and deserialization.
`static byte`	`TC_ARRAY`	Tag to mark a new array.
`static byte`	`TC_BASE`	The minimum tag value.
`static byte`	`TC_BLOCKDATA`	Tag to mark a block of optional data.
`static byte`	`TC_BLOCKDATALONG`	Tag to mark a long block of data.
`static byte`	`TC_CLASS`	Tag to mark a reference to a class.
`static byte`	`TC_CLASSDESC`	Tag to mark a new class descriptor.
`static byte`	`TC_ENDBLOCKDATA`	Tag to mark the end of block data blocks for an object.
`static byte`	`TC_ENUM`	Tag to mark a new enum.
`static byte`	`TC_EXCEPTION`	Tag to mark an exception.
`static byte`	`TC_LONGSTRING`	Tag to mark a long string.
`static byte`	`TC_MAX`	The maximum tag value.
`static byte`	`TC_NULL`	Tag to mark a `null` object reference.
`static byte`	`TC_OBJECT`	Tag to mark a new object.
`static byte`	`TC_PROXYCLASSDESC`	Tag to mark a new proxy class descriptor.
`static byte`	`TC_REFERENCE`	Tag to mark a reference to an object that has already been written to the stream.
`static byte`	`TC_RESET`	Tag to mark a stream reset.
`static byte`	`TC_STRING`	Tag to mark a new string.

- Field Detail
  - STREAM_MAGIC
```
static final short STREAM_MAGIC
```
    The stream header's magic number.
    
    See Also:
    
    Constant Field Values
  - STREAM_VERSION
```
static final short STREAM_VERSION
```
    The stream header's version number.
    
    See Also:
    
    Constant Field Values
  - TC_BASE
```
static final byte TC_BASE
```
    The minimum tag value.
    
    See Also:
    
    Constant Field Values
  - TC_NULL
```
static final byte TC_NULL
```
    Tag to mark a null object reference.
    
    See Also:
    
    Constant Field Values
  - TC_REFERENCE
```
static final byte TC_REFERENCE
```
    Tag to mark a reference to an object that has already been written to the stream.
    
    See Also:
    
    Constant Field Values
  - TC_CLASSDESC
```
static final byte TC_CLASSDESC
```
    Tag to mark a new class descriptor.
    
    See Also:
    
    Constant Field Values
  - TC_OBJECT
```
static final byte TC_OBJECT
```
    Tag to mark a new object.
    
    See Also:
    
    Constant Field Values
  - TC_STRING
```
static final byte TC_STRING
```
    Tag to mark a new string.
    
    See Also:
    
    Constant Field Values
  - TC_ARRAY
```
static final byte TC_ARRAY
```
    Tag to mark a new array.
    
    See Also:
    
    Constant Field Values
  - TC_CLASS
```
static final byte TC_CLASS
```
    Tag to mark a reference to a class.
    
    See Also:
    
    Constant Field Values
  - TC_BLOCKDATA
```
static final byte TC_BLOCKDATA
```
    Tag to mark a block of optional data. The byte following this tag indicates the size of the block.
    
    See Also:
    
    Constant Field Values
  - TC_ENDBLOCKDATA
```
static final byte TC_ENDBLOCKDATA
```
    Tag to mark the end of block data blocks for an object.
    
    See Also:
    
    Constant Field Values
  - TC_RESET
```
static final byte TC_RESET
```
    Tag to mark a stream reset.
    
    See Also:
    
    Constant Field Values
  - TC_BLOCKDATALONG
```
static final byte TC_BLOCKDATALONG
```
    Tag to mark a long block of data. The long following this tag indicates the size of the block.
    
    See Also:
    
    Constant Field Values
  - TC_EXCEPTION
```
static final byte TC_EXCEPTION
```
    Tag to mark an exception.
    
    See Also:
    
    Constant Field Values
  - TC_LONGSTRING
```
static final byte TC_LONGSTRING
```
    Tag to mark a long string.
    
    See Also:
    
    Constant Field Values
  - TC_PROXYCLASSDESC
```
static final byte TC_PROXYCLASSDESC
```
    Tag to mark a new proxy class descriptor.
    
    See Also:
    
    Constant Field Values
  - TC_MAX
```
static final byte TC_MAX
```
    The maximum tag value.
    
    See Also:
    
    Constant Field Values
  - baseWireHandle
```
static final int baseWireHandle
```
    Handle for the first object that gets serialized.
    
    See Also:
    
    Constant Field Values
  - PROTOCOL_VERSION_1
```
static final int PROTOCOL_VERSION_1
```
    Stream protocol version 1.
    
    See Also:
    
    Constant Field Values
  - PROTOCOL_VERSION_2
```
static final int PROTOCOL_VERSION_2
```
    Stream protocol version 2.
    
    See Also:
    
    Constant Field Values
  - SUBCLASS_IMPLEMENTATION_PERMISSION
```
static final SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION
```
    Permission constant to enable subclassing of ObjectInputStream and ObjectOutputStream.
  - SUBSTITUTION_PERMISSION
```
static final SerializablePermission SUBSTITUTION_PERMISSION
```
    Permission constant to enable object substitution during serialization and deserialization.
  - SC_WRITE_METHOD
```
static final byte SC_WRITE_METHOD
```
    Bit mask for the flag field in ObjectStreamClass. Indicates that a Serializable class has its own writeObject method.
    
    See Also:
    
    Constant Field Values
  - SC_SERIALIZABLE
```
static final byte SC_SERIALIZABLE
```
    Bit mask for the flag field in ObjectStreamClass. Indicates that a class implements Serializable but not Externalizable.
    
    See Also:
    
    Constant Field Values
  - SC_EXTERNALIZABLE
```
static final byte SC_EXTERNALIZABLE
```
    Bit mask for the flag field in ObjectStreamClass. Indicates that a class implements Externalizable.
    
    See Also:
    
    Constant Field Values
  - SC_BLOCK_DATA
```
static final byte SC_BLOCK_DATA
```
    Bit mask for the flag field in ObjectStreamClass. Indicates that an externalizable class is written in block data mode.
    
    See Also:
    
    Constant Field Values
  - TC_ENUM
```
static final byte TC_ENUM
```
    Tag to mark a new enum.
    
    See Also:
    
    Constant Field Values
  - SC_ENUM
```
static final byte SC_ENUM
```
    Bit mask for the flag field in ObjectStreamClass. Indicates that a class is an enum type.
    
    See Also:
    
    Constant Field Values

Interface ObjectStreamConstants

Field Summary

Field Detail

STREAM_MAGIC

STREAM_VERSION

TC_BASE

TC_NULL

TC_REFERENCE

TC_CLASSDESC

TC_OBJECT

TC_STRING

TC_ARRAY

TC_CLASS

TC_BLOCKDATA

TC_ENDBLOCKDATA

TC_RESET

TC_BLOCKDATALONG

TC_EXCEPTION

TC_LONGSTRING

TC_PROXYCLASSDESC

TC_MAX

baseWireHandle

PROTOCOL_VERSION_1

PROTOCOL_VERSION_2

SUBCLASS_IMPLEMENTATION_PERMISSION

SUBSTITUTION_PERMISSION

SC_WRITE_METHOD

SC_SERIALIZABLE

SC_EXTERNALIZABLE

SC_BLOCK_DATA

TC_ENUM

SC_ENUM