How do you make flags for command line arguments in Java? [closed]

Answer 1

Even though this might not directly answer your question, I strongly suggest that you use a library for that. Some widely used options:

1. Commons CLI - http://commons.apache.org/proper/commons-cli/
2. JCommander - http://jcommander.org/
3. JOpt-Simple - http://pholser.github.io/jopt-simple/
4. ArgParse4J - http://argparse4j.sourceforge.net/

After all, "life is too short to parse command line parameters". As an example (using JCommander), you just need to define your parameters through annotations:

//class MyOptions
@Parameter(names = { "-d", "--outputDirectory" }, description = "Directory")
private String outputDirectory;

And then parse your bean using:

public static void main(String[] args){
    MyOptions options = new MyOptions();
    new JCommander(options, args);
}