public class ValueOfDemo {    public static void main(String[] args) {	//this program requires two arguments on the command line        if (args.length == 2) {            //convert strings to numbers            float a = Float.valueOf(args[0]).floatValue();            float b = Float.valueOf(args[1]).floatValue();            //do some arithmetic            System.out.println("a + b = " + (a + b) );            System.out.println("a - b = " + (a - b) );            System.out.println("a * b = " + (a * b) );            System.out.println("a / b = " + (a / b) );            System.out.println("a % b = " + (a % b) );        } else {            System.out.println("This program requires two command-line arguments.");        }    }}