JarLook 1.2 freeware download
... 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 ... 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, ...
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