Java Object Serialization Specification: 6 - Object Serialization Stream Protocol - JDK 5 Documentation v1.4.1, Java 2 SDK 英文文档

Java Object Serialization Specification

6.4 Grammar for the Stream Format

The table below contains the grammar for the stream format. Nonterminal symbols are shown in italics. Terminal symbols in a fixed width font. Definitions of nonterminals are followed by a ":". The definition is followed by one or more alternatives, each on a separate line. The following table describes the notation:

Notation
Meaning

(datatype)

This token has the data type specified, such as byte.

token[n]

A predefined number of occurrences of the token, that is an array.

x0001

A literal value expressed in hexadecimal. The number of hex digits reflects the size of the value.

<xxx>

A value read from the stream used to indicate the length of an array.

Note that the symbol (long-utf) is used to designate a string written in "long" UTF format. For details, refer to Section 6.2, "Stream Elements".

Notation	Meaning
(datatype)	This token has the data type specified, such as byte.
token[n]	A predefined number of occurrences of the token, that is an array.
x0001	A literal value expressed in hexadecimal. The number of hex digits reflects the size of the value.
<xxx>	A value read from the stream used to indicate the length of an array.

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