Java in a Nutshell, 5th Edition [Electronic resources] نسخه متنی

Synopsis

Description

serialver displays
the version number of a class or classes. This version number is used
for the purposes of serialization: the version number must change
each time the serialization format of the class changes.

If the specified class declares a long
serialVersionUID constant, the value of that field
is displayed. Otherwise, a unique version number is computed by
applying the Secure Hash Algorithm (SHA) to the
API defined by the class. This program is primarily useful for
computing an initial unique version number for a class, which is then
declared as a constant in the class. The output of

serialver is a line of legal Java code, suitable
for pasting into a class definition.

Options

-classpath path

Specifies the search path for classes.

-show

When the -show option is specified,

serialver displays a simple graphical interface
that allows the user to type in a single class name at a time and
obtain its serialization UID. When using -show, no
class names can be specified on the command line.

Environment

CLASSPATH

serialver is written in Java, so it is sensitive
to the CLASSPATH environment variable in the same
way the

java interpreter is. The specified
classes are looked up relative to this
classpath.

See also

java.io.ObjectStreamClass