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You can set environment variables or pass them in using the -Dvariablename syntax SET logfile=/location/to/my/log/file.log or java -Dlogfile=/location/to/my/log/file.log HelloWorld When you want to access these environment variables from your Java source file you can use Java 1.5 and newer: String logfileLocation = System.getenv(“logfile”); Java 1.4 and older: String logfileLocation = System.getProperty(“logfile”);