import com.martiansoftware.jsap.*; public class MyApp { public static void main(String[] args) throws JSAPException { JSAP jsap = new JSAP(); FlaggedOption inputOption = new FlaggedOption("input") .setStringParser(JSAP.STRING_PARSER) .setRequired(true) .setShortFlag('i') .setLongFlag("input") .setHelp("Input file"); jsap.registerParameter(inputOption); JSAPResult result = jsap.parse(args); if (!result.success()) { System.err.println("Usage: java MyApp " + jsap.getUsage()); System.err.println(jsap.getHelp()); return; } String inputFile = result.getString("input"); System.out.println("Input file: " + inputFile); } }