Main Function Example

public class Main {

    /**
     * @param args
     */
    public static void main(String[] args) {
        int count = 0;//Set our counter
        if(args.length < 1){
            //No parameters is this a problem?
        }
        while(count < args.length){//While we have not reached the end of our arguments keep going.
            switch(args[count]){
                case "-h"://Display help info
                    System.out.println("This is the help message. Proper command syntax:");
                    System.out.println("cmdline -v: Displays version information");
                    System.out.println("cmdline -h: Displays this help message");
                    System.out.println("cmdline -f [file]: Sets file to file provided");
                    count++;
                break;
                case "-v"://Display version information
                    System.out.println("Cmdline parse sample version 1.0.0");
                    count++;
                break;
                case "-f"://This is an example to show you how to handle when you have a parameter that takes info
                    String fileName = args[count+1];//We are getting the filename so set it to the string after -f
                    System.out.println("Input file is "+fileName);//Print out info
                    count = count+2;//Increment counter to next item (skipping filename).
                    //Note this provides no bounds checking so if you pass the parameter without file info it may bomb if at the end
                    //You may also surround it in a try/catch for safety.
                break;
                default://If none of your cases match then this is an unrecognized parameter and we will exit.
                    System.out.println("Unrecognized parameter "+args[count]+"\nExiting.");
                    System.exit(-1);
                break;
            }
        }
    }

}