import org.apache.commons.cli.*;
public class MyCLI {
public static void main(String[] args) {
Options options = new Options();
options.addOption("h", "help", false, "Display help information");
options.addOption("u", "username", true, "Username");
CommandLineParser parser = new DefaultParser();
try {
CommandLine cmd = parser.parse(options, args);
if (cmd.hasOption("h")) {
// Display help information
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp("mycli", options);
} else if (cmd.hasOption("u")) {
// Process username option
String username = cmd.getOptionValue("u");
System.out.println("Hello, " + username + "!");
} else {
// No options provided
System.out.println("No options provided. Use -h to display help information.");
}
} catch (ParseException e) {
// Parsing failed, display error message
System.err.println("Parsing failed. Use -h to display help information.");
}
}
}
