How to print help using jcommander?

Question

How to print help using jcommander?

I couldn\'t find an API for this.

Answer 1

With the newer version of JCommander you need to create a instantiation of JCommander.

For example the main is:

public class Usage {
  public static void main(String...argv) {
    Args args = new Args();
    JCommander jct = JCommander.newBuilder().addObject(args).build();
    jct.parse(argv);
    if (args.isHelp()) {
         jct.usage();
    }
  }
}

With a Args Class like that (if you not define your parameter in the Main):

import com.beust.jcommander.Parameter;
import com.beust.jcommander.Parameters;

public class Args {

 @Parameter(names = { "--help", "-h" }, help = true)
 private boolean help = false;

 public boolean isHelp() {
    return help;
 }
}