how to parse command line arguments

TestParams

@CommandDefinition(name = "testparams", description = "")
public class TestParams implements Command {

    @Option(shortName = 'f', description = "set the foo value")
    private String foo;

    @Option(shortName = 'b', required = true)
    private String bar;


    public static void main(String[] args) {
        TestParams test = new TestParams();

        try {
            ParserGenerator.parseAndPopulate(test, "testparams", args);

            System.out.println("you set foo to: " + test.foo);
            System.out.println("you set bar to: "+test.bar);
        }
        catch(CommandLineParserException e) {
            System.out.println("Error when parsing: "+e.toString());
        }
        catch(OptionValidatorException e) {
            System.out.println("Validation failed: "+e.toString());
        }

    }

    @Override
    //never called
    public CommandResult execute(CommandInvocation commandInvocation) throws IOException, InterruptedException {
        return null;
    }
}