MACAddress

import java.util.Scanner;
/*    Class MACAddress
 *    Purpose:  this class models a networking hardware address - also known as MAC Address
 *    Author:  Robert Taracha
 *    Data:   address:  String (to hold the 12 char address)
 *    Methods:  default constructor - initializes to blank string
 *              initial constructor (String) - intiializes to String parameter as long as it is 12 chars long
 *              initial constructor (MACAddress) - intializes to String in parameter MACAddress object
 *              readAddress (Scanner): boolean - reads a MACAddress from the Scanner object buffer and returns
 *                              boolean if successful
 *              isEqual(MACAddress):boolean - compares the current object string to string in parameter object
 *                              and return boolean true if equal, else returns boolean false
 *              isGreaterThan(MACAddress): boolean - compares for greater than.
 *              toString():String - returns String address
 */

public class MACAddress {
    public String getAddress() {
        return address;
    }

    private String address;

    public MACAddress() {
        address = new String();
    }

    public MACAddress(String address) {
        if (address.length() == 12)
            this.address = new String(address);
        else this.address = new String();   // if error, set to empty address
    }
    public MACAddress(MACAddress mac) {
        this.address = new String(mac.address);
    }

    public boolean readAddress(Scanner inFile) {
        address = inFile.next();
        if (address.length() == 12)
            return true;
        else {
            address = new String();  // if error, set to empty address
            return false;
        }
    }

    public boolean isEqual (MACAddress rhs) {
        return rhs.address.equalsIgnoreCase(this.address);
    }

    public boolean isGreaterThan (MACAddress rhs) {
        return (this.address.compareToIgnoreCase(rhs.address) > 0);
    }

    public String toString() {
        String out = address.substring(0,2);
        for (int i=2; i<12; i+=2)
            out +=  ":" + address.substring(i, i+2);
        return out;
    }
}