import org.apache.commons.cli.*;
public class MyApp {
public static void main(String[] args) {
Options options = new Options();
options.addOption("f", "file", true, "input file");
CommandLineParser parser = new DefaultParser();
try {
CommandLine cmd = parser.parse(options, args);
if (cmd.hasOption("f")) {
String fileName = cmd.getOptionValue("f");
System.out.println("Input file: " + fileName);
} else {
System.out.println("No input file specified");
}
} catch (ParseException e) {
System.out.println("Error parsing command line arguments: " + e.getMessage());
}
}
}
