Setting a value from an input in a Command line

[beastman3226]

How do I set a value from an input from the command prompt?
I want to set the value that i get from the user to a method. For example setAge(Double age).
I get 24 from the user, then I need to set the value (24) to their age. How do I do this?

[wdh321]

Have a look here Command-Line Arguments (The Java™ Tutorials > Essential Classes > The Platform Environment) or search for command line arguments.

[beastman3226]

Here my current code:

public static void readName(){ 
    System.out.print("What is your name? ");

      //  open up standard input
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

      String userName = null;

      //  read the username from the command-line; need to use try/catch with the
      //  readLine() method
      try {
         userName = br.readLine();
      } catch (IOException ioe) {
         System.out.println("IO error trying to read your name!");
         System.exit(1);
      }

      System.out.println("Thanks for the name, " + userName);
    }
public static void readAge(){
        Scanner scan = new Scanner(System.in);
        System.out.print("What is your age? ");
        double age = scan.nextDouble();
        System.out.println("Your are " + age + " years old");
    }
    public static void readWeight(){
        Scanner scan = new Scanner(System.in);
        System.out.print("What is your age? ");
        double weigh = scan.nextDouble();
        System.out.println("Your weight " + weigh);
      }

I want the values of weigh and age. I don't want actual commands.

[Tolls]

You've got them.
The question is what do you want to do with them, as currently they only exist in the methods themselves.