import org.apache.commons.cli.*;
public class CommandLineParserExample {
public static void main(String[] args) throws ParseException {
Options options = new Options();
options.addOption("h", "help", false, "Print help");
options.addOption("u", "username", true, "Username");
CommandLineParser parser = new DefaultParser();
CommandLine cmd = parser.parse(options, args);
if (cmd.hasOption("h")) {
printHelp(options);
}
if (cmd.hasOption("u")) {
String username = cmd.getOptionValue("u");
System.out.println("Username: " + username);
}
}
private static void printHelp(Options options) {
HelpFormatter formatter = new HelpFormatter();
formatter.printHelp("CLIExample", options, true);
}
}
import picocli.CommandLine;
import picocli.CommandLine.Command;
import picocli.CommandLine.Option;
import picocli.CommandLine.Parameters;
@Command(name = "CLIExample", description = "A simple CLI example")
public class CommandLineParserExample implements Runnable {
@Option(names = {"-h", "--help"}, description = "Print help")
private boolean help;
@Option(names = {"-u", "--username"}, description = "Username")
private String username;
public static void main(String[] args) {
CommandLine.run(new CommandLineParserExample(), args);
}
@Override
public void run() {
if (help) {
CommandLine.usage(this, System.out);
}
if (username != null) {
System.out.println("Username: " + username);
}
}
}
import com.beust.jcommander.*;
public class CommandLineParserExample {
@Parameter(names = {"-h", "--help"}, help = true, description = "Print help")
private boolean help;
@Parameter(names = {"-u", "--username"}, description = "Username")
private String username;
public static void main(String[] args) {
CommandLineParserExample example = new CommandLineParserExample();
JCommander commander = JCommander.newBuilder()
.addObject(example)
.build();
commander.parse(args);
if (example.help) {
commander.usage();
}
if (example.username != null) {
System.out.println("Username: " + example.username);
}
}
}
