<dependency> <groupId>net.sourceforge.optparse</groupId> <artifactId>optparse</artifactId> <version>1.4</version> </dependency> import net.sourceforge.optparse.OptionParser; import net.sourceforge.optparse.OptionSet; public class MyProgram { public static void main(String[] args) { OptionParser parser = new OptionParser(); parser.accepts("input").withRequiredArg().ofType(String.class).required(); parser.accepts("output").withOptionalArg().ofType(String.class); OptionSet options = parser.parse(args); String inputFile = (String) options.valueOf("input"); String outputFile = (String) options.valueOf("output"); // ... } } java MyProgram --input input.txt --output output.txt


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