Java Module java.base Package java.io Interface ObjectStreamConstants（JDK11）

Field Detail

• STREAM_MAGIC

  static final short STREAM_MAGIC

  Magic number that is written to the stream header.

  See Also:

  Constant Field Values

• STREAM_VERSION

  static final short STREAM_VERSION

  Version number that is written to the stream header.

  See Also:

  Constant Field Values

• TC_BASE

  static final byte TC_BASE

  First tag value.

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  Constant Field Values

• TC_NULL

  static final byte TC_NULL

  Null object reference.

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  Constant Field Values

• TC_REFERENCE

  static final byte TC_REFERENCE

  Reference to an object already written into the stream.

  See Also:

  Constant Field Values

• TC_CLASSDESC

  static final byte TC_CLASSDESC

  new Class Descriptor.

  See Also:

  Constant Field Values

• TC_OBJECT

  static final byte TC_OBJECT

  new Object.

  See Also:

  Constant Field Values

• TC_STRING

  static final byte TC_STRING

  new String.

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  Constant Field Values

• TC_ARRAY

  static final byte TC_ARRAY

  new Array.

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  Constant Field Values

• TC_CLASS

  static final byte TC_CLASS

  Reference to Class.

  See Also:

  Constant Field Values

• TC_BLOCKDATA

  static final byte TC_BLOCKDATA

  Block of optional data. Byte following tag indicates number of bytes in this block data.

  See Also:

  Constant Field Values

• TC_ENDBLOCKDATA

  static final byte TC_ENDBLOCKDATA

  End of optional block data blocks for an object.

  See Also:

  Constant Field Values

• TC_RESET

  static final byte TC_RESET

  Reset stream context. All handles written into stream are reset.

  See Also:

  Constant Field Values

• TC_BLOCKDATALONG

  static final byte TC_BLOCKDATALONG

  long Block data. The long following the tag indicates the number of bytes in this block data.

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  Constant Field Values

• TC_EXCEPTION

  static final byte TC_EXCEPTION

  Exception during write.

  See Also:

  Constant Field Values

• TC_LONGSTRING

  static final byte TC_LONGSTRING

  Long string.

  See Also:

  Constant Field Values

• TC_PROXYCLASSDESC

  static final byte TC_PROXYCLASSDESC

  new Proxy Class Descriptor.

  See Also:

  Constant Field Values

• TC_ENUM

  static final byte TC_ENUM

  new Enum constant.

  Since:

  1.5

  See Also:

  Constant Field Values

• TC_MAX

  static final byte TC_MAX

  Last tag value.

  See Also:

  Constant Field Values

• baseWireHandle

  static final int baseWireHandle

  First wire handle to be assigned.

  See Also:

  Constant Field Values

• SC_WRITE_METHOD

  static final byte SC_WRITE_METHOD

  Bit mask for ObjectStreamClass flag. Indicates a Serializable class defines its own writeObject method.

  See Also:

  Constant Field Values

• SC_BLOCK_DATA

  static final byte SC_BLOCK_DATA

  Bit mask for ObjectStreamClass flag. Indicates Externalizable data written in Block Data mode. Added for PROTOCOL_VERSION_2.

  Since:

  1.2

  See Also:

  PROTOCOL_VERSION_2, Constant Field Values

• SC_SERIALIZABLE

  static final byte SC_SERIALIZABLE

  Bit mask for ObjectStreamClass flag. Indicates class is Serializable.

  See Also:

  Constant Field Values

• SC_EXTERNALIZABLE

  static final byte SC_EXTERNALIZABLE

  Bit mask for ObjectStreamClass flag. Indicates class is Externalizable.

  See Also:

  Constant Field Values

• SC_ENUM

  static final byte SC_ENUM

  Bit mask for ObjectStreamClass flag. Indicates class is an enum type.

  Since:

  1.5

  See Also:

  Constant Field Values

• SUBSTITUTION_PERMISSION

  static final SerializablePermission SUBSTITUTION_PERMISSION

  Enable substitution of one object for another during serialization/deserialization.

  Since:

  1.2

  See Also:

  ObjectOutputStream.enableReplaceObject(boolean), ObjectInputStream.enableResolveObject(boolean)

• SUBCLASS_IMPLEMENTATION_PERMISSION

  static final SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION

  Enable overriding of readObject and writeObject.

  Since:

  1.2

  See Also:

  ObjectOutputStream.writeObjectOverride(Object), ObjectInputStream.readObjectOverride()

• SERIAL_FILTER_PERMISSION

  static final SerializablePermission SERIAL_FILTER_PERMISSION

  Enable setting the process-wide serial filter.

  Since:

  9

  See Also:

  ObjectInputFilter.Config.setSerialFilter(ObjectInputFilter)

• PROTOCOL_VERSION_1

  static final int PROTOCOL_VERSION_1

  A Stream Protocol Version.

  All externalizable data is written in JDK 1.1 external data format after calling this method. This version is needed to write streams containing Externalizable data that can be read by pre-JDK 1.1.6 JVMs.

  Since:

  1.2

  See Also:

  ObjectOutputStream.useProtocolVersion(int), Constant Field Values

• PROTOCOL_VERSION_2

  static final int PROTOCOL_VERSION_2

  A Stream Protocol Version.

  This protocol is written by JVM 1.2. Externalizable data is written in block data mode and is terminated with TC_ENDBLOCKDATA. Externalizable class descriptor flags has SC_BLOCK_DATA enabled. JVM 1.1.6 and greater can read this format change. Enables writing a nonSerializable class descriptor into the stream. The serialVersionUID of a nonSerializable class is set to 0L.

  Since:

  1.2

  See Also:

  ObjectOutputStream.useProtocolVersion(int), SC_BLOCK_DATA, Constant Field Values