Java Reference
In-Depth Information
Prints a document using the given
Printable
object instead of a
Pageable
one.
•
java.awt.print.PageFormat showPageFormatDialog(java.awt.print.PageFormat
page)
Displays the properties dialog box of a
PageFormat
object, returning it modified by the
user.
JARDiff Format
The JARDiff format is a way to perform incremental updates to a JAR file. It is composed of a
special JAR file sent to the client, which describes the differences between two JAR files, say
OldJAR
and
NewJAR
.
B
The differencing information is stored in the “
META-INF/INDEX.JD
”text file, and describes the
copies of new or changed files in the
NewJAR
file relative to the
OldJAR
file.
The file is composed of lines
<command> space <value>
. The first line describes the JARDiff
format version (currently 1.0):
version <version>
And following are lines of two types:
•
remove <fully qualified class in OldJar but not in NewJAR>
•
move <fully qualified class in OldJAR> <fully qualified class in NewJAR >
.
That describes the differences between the already-installed
OldJAR
file and to-be-installed
NewJAR
file.
Versioning Notation
This section covers the versioning notation. It is implemented in the JNLP protocol as strings
conforming to given rules. See Chapter 12, “Server-Side Deployment Support,” for the classes
that concretely implement these algorithms in Java.
Throughout this section, given two strings of all-ASCII characters representing Version Ids
v1
,
v2
, we represent them in the following way:
v1 = v1H+v1T; v2 = v2H + v2T
where
vxH
is the substring up to the first occurrence of the separator characters and
vxT
is all
the rest (the tail).
