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JarLook 1.2
JarLook 1.2 screenshot
Check that class target versions are as expected in a Java jar.
Hits: 636 visitors Publisher: Canadian Mind Products OS Support: Java, Linux, Mac OS X, Unix, Win2000, Win7 x32, Win7 x64, WinServer, WinXP, Win Vista License: Freeware Date added: 20 Dec 2012 Last Update: 06 Mar 2006 Downloads: 2

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JarLook Publisher's description

Check that class target versions are as expected in a Java jar.

Check a Java jar to make sure all the javac -target versions of

the class files are what you expect.

Java application.

Requires Java version 1.5 or later.

All Java source code is included.

to use:

java -jar jarlook.jar jartotocheck.jar 1.1 1.4

where jartocheck.jar is the name of jar to check.

It will check all the class files in it.

In this example:

1.1 is the lowest acceptable target version number.

1.4 is the highest acceptable target version number.

Currently, only version numbers 1.0, 1.1, 1.2, 1.3, 1.4, 1.5

and 1.6 are supported. The program does not currently test

minor version numbers.

Why would you use this utility? To make sure that a jar

intended to run under an old 1.1 JVM contains no classes

accidentally compiled with javac -target 1.5. Passing this

test does not guarantee the jar will work on an old JVM. The

jar still might use methods not bundled with old JVMs. This

should catch however, classes normally compiled with target

1.1 that were accidentally compiled with 1.5 as a side

effect of compiling some 1.5 class.

There is a similar program called JarCheck available at
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Version History
Version 1.2 added on: 20 Dec 2012

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Related Tags
    jarlook          jar          Java          version          major          minor          target      

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