JarCheck 1.4 build: 9470 released: 2011-07-30 Check a jar to make sure all the javac -target versions of the class files are what you expect. Copyright: (c) 2012 Canadian Mind Products. Java application. Download from: http://mindprod.com/products1.html#JARCHECK ===> Free <=== Full source included. You may even include the source code, modified or unmodified in free/commercial open source/proprietary programs that you write and distribute. May be used freely for any purpose but military. For more details on this restriction, see http://mindprod.com/contact/nonmil.html If you include any Canadian Mind Products code in your own applications, your app too must be labeled non-military use only. All Java jars and source code are included. ---- Prerequisites: This program runs under any OS, (e.g. Win2K/XP/Vista/W7x86/W7-64/OSX/Linux/Solaris/AIX...) so long as you have <><> Java version 1.5 <><> or later installed (32-bit or 64-bit Java). See http://mindprod.com/jgloss/installingjava.html for details. ---- Installing on a PC: Download source and compiled class files to run on your own machine as an application. First install a recent Java JDK or JVM. See http://mindprod.com/jgloss/installingjava.html. To install, extract the zip download with WinZip (or similar unzip utility) into any directory you please, often J:\ -- ticking off the "use folder names" option. To run as an application,type: java -ea -jar J:\com\mindprod\jarcheck\jarcheck.jar {put any parms here} adjusting as necessary to account for where the jar file is. ---- Installing on a MacIntosh: Use Safari to download source and compiled class files to run on your own machine as an application. Safari will automatically unpack the zip into ~/Downloads (version 10.5) [or on the Desktop (version 10.4 and earlier)]. First install a recent Java JDK or JVM. See http://mindprod.com/jgloss/installingjava.html. You may optionally move the download tree to a permanent home. I don't have a MacIntosh, just a PC, so I can't test my Java programs for Mac compatibility. In theory they should work without problems, but in practice that does not always happen. If you have problems please, let me know, preferably with screenshots and complete verbatim error messages. To run as an application, without parameters, just double click the jar file. To run as an application with parameters, in bash shell type: open Terminal.app cd ~/Desktop java -ea -jar com/mindprod/jarcheck/jarcheck.jar {put any parms here} adjusting as necessary to account for where the jar file is. ---- Rebuilding: The zip already contains the necessary class and jar files, so unless you modify the program, there is no need to recompile the source or rebuild the jar. Configure.java basedir="E:/" in rebuild.xml to the drive where your files are. Use ANT and rebuild.xml, not build.xml, to recompile and recreate the jar. ---- Use: Check a jar to make sure all the javac -target versions of the class files are what you expect. to use: java -jar jarcheck.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. Returns errorlevel 0 = all ok 1 = one or more class files bad 2 = jar unreadable or syntax error Errors are directory to System.err and messages about correct entries go to System.out. 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. You can download it from http://mindprod.com/products1.html#JARLOOK To install, Extract the zip download with WinZip, available from http://www.winzip.com (or similar unzip utility) into any directory you please, often C:\ -- ticking off the "user folder names" option. To run as an application, type: java -jar C:\com\mindprod\jarcheck\jarcheck.jar adjusting as necessary to account for where the jar file is. Don't confuse jarcheck with a similar simpler CMP utility called jarlook. Why the coffee bean in a jar icon? This is Sun's logo to represent Java in a jar file. ---- Version History: 1.0 2006-01-16 initial version 1.1 2006-01-16 1.2 2006-03-05 reformat with IntelliJ, add Javadoc 1.3 2008-04-21 display version number of each class file checked. 1.4 2011-07-30 add support for Java 1.7 -30-