Thread: Interface problem please help!!

Hi....

I have 2 files: Interface 'Car' and Class 'MyCar'

I have never worked with interfaces before but I am getting the error:
MyCar.java:6: MyCar is not abstract and does not override abstract method compareTo(Car) in java.lang.Comparable

Please help!!

/**
 * Class to represent cars
 * @author 
 * @version ONE 05/04/2010
 */
public class MyCar implements Car
{
   public String getModel()
	{
	 return model;
	}
 
	public String getRegNo()
	{
	return regNo;
	}
 
	public int getYear()
	{
	return year;
	}    
 
   public int getPrice()
	{
	return price;
	}    
 
   public void setPrice(int priceNew)
	{
	price=priceNew;
	}
 
   public int getCompCount()
	{
	return 1;
	}
 
   public boolean match(String model, int year, int price)
   {
	if(thisModel == model && thisYear == year && thisPrice == price)
		{ 
			return true;
		}
	} 
 
   public String toString()
	{
	String carString = ("Price: " + price + 
								" Year : " + year + " Reg Number : " + 
								regNo + " Registration : " + model); 
 
	return carString;
	}
}

/**
 * Interface for a class to represent cars.
 * @
 * @version 1.4 - 15/1/10
 */
public interface Car extends Comparable<Car>
{
    /**
     * Get the car's model description
     * @return  the model
     */
    public String getModel();
 
    /**
     * Get the car's registration number
     * @return  the regNo
     */
    public String getRegNo();
 
    /**
     * Get the car's year of registration
     * @return  the year
     */
    public int getYear();
 
    /**
     * Get the car's price
     * @return  the price
     */
    public int getPrice();
 
    /**
     * Set the car's price
     * @param price  the price
     */
    public void setPrice(int price);
 
    /**
     * Get & reset the comparison counter value
     * @return  the count (before resetting to zero)
     */
    public int getCompCount();
 
    /**
     * Check for "near match" (see assignment brief for details)
     * @param model  ignore if null/empty, else match as substring
     * @param year   ignore if <= 0, else match to within 1 yr
     * @param price  ignore if <= 0, else match to within 10%
     * @return  true if "near match" as above, else false
     */
    public boolean match(String model, int year, int price);
 
    /**
     * Create a string with price, year, regNo & model description
     * concatenated in that order, separated by single tabs
     * @return  a printable string as above 
     */
    public String toString();
}