e2j is an unpacker for jars packed via Jar2Exe hidden mode written by veer usage: C:\dev\e2j>set old_opts=%JAVA_TOOL_OPTIONS% C:\dev\e2j>set JAVA_TOOL_OPTIONS=-javaagent:e2j-agent.jar(=output-file) C:\dev\e2j>packed-exe ... C:\dev\e2j>set JAVA_TOOL_OPTIONS=%old_opts% where: ou