I admit that I have struggled with ifthen statements and arr

I admit that I have struggled with if/then statements and arrays. I am trying to calculate fees for renting a television for a certain amount of weeks. Here is my code, when tested it does not return the correct values. Any help would be more than appreciated!

/**
* This class represents a television to be rented.
*
*/
public class Television implements Item
{
    public static final double DELTA = 0.001;

    private String Description;
    private Money WeeklyRate;
    private String Id;
    private Money calculateFee;
    private int size;
    private String type;
    private boolean rented;
    private boolean returned;
    private boolean isRented;
   
    /**
     * Constructor for objects of class Television.
     */
    public Television()
    {
        this.Description = \"\";
        this.WeeklyRate = new Dollar();
        this.Id = \"\";
        this.type = \"\";
        this.size = 0;
        this.calculateFee = null;
        this.rented = false;
        this.isRented = false;
        this.returned = false;
    }

    /**
     * Return the description of the Television.
     * @return the description.
     */

    public String getDescription()
    {

        return this.Description;
    }

    /**
     * Change the description of the television to the
     * given parameter.
     * @param desc the new description.
     */
    public void setDescription(String desc)
    {
        this.Description = desc;
    }

    /**
     * Return the weekly rental rate for the television.
     * @return the rate.
     */
    public Money getWeeklyRate()
    {
        return WeeklyRate;
    }

    /**
     * Change the weekly rental rate of the television
     * to the given parameter.
     * @param wklyRate the new weekly rate.
     */
    public void setWeeklyRate(Money wklyRate)
    {
        this.WeeklyRate = wklyRate;
    }

    /**
     * Return the ID of the television.
     * @return the ID.
     */
    public String getId()
    {
        return this.Id;
    }

    /**
     * Change the ID of the television to the given
     * parameter.
     * @param idNum the new ID.
     */
    public void setId(String idNum)
    {
        this.Id = idNum;
    }

    /**
     * Calculate the fees for renting the television for a given
     * number of weeks. The weekly rate must be set and the
     * number of rental weeks must be valid in order for the fee
     * to be calculated.
     * @param weeks the number of rental weeks
     * @return the fee or null if the fee could not be calculated
     */
    public Money calculateFee(int weeks)
    {
        if (weeks == 0)
          
        {
            return null;
        }
        else if (weeks > 0 && weeks <= 4)

        {
            return WeeklyRate = WeeklyRate.mul(weeks);
        }

        return null;
    }

    /**
     * Return the size of the television.
     * @return the size.
     */
    public int getSize()
    {
        return this.size;
    }

    /**
     * Change the size of the television to the given
     * parameter.
     * @param screenSize the new size.
     */
    public void setSize(int screenSize)
    {
        this.size = screenSize;
    }

    /**
     * Return the type of the television.
     * @return the type.
     */
    public String getType()
    {
        return this.type;
    }

    /**
     * Change the type of the television to the given
     * parameter.
     * @param screenType the new type.
     */
    public void setType(String screenType)
    {
        this.type = screenType;
    }

    /**
     * Indicate the television has been rented.
     */
    public void rented()
    {
        this.rented = true ;
    }

    /**
     * Indicate the television has been returned and is no
     * longer rented.
     */
    public void returned()
    {
        this.returned = false ;
    }

    /**
     * Return the rental status of the television.
     * @return true if the television is rented, otherwise false.
     */
    public boolean isRented()
    {
        if (isRented == true)
        {
            return true;
        }
        else
      
        return false ;
    }
}

Solution

Please try this code:-

public Money calculateFee(int weeks)
    {
       if (weeks > 0 && weeks <= 4)

        {
            return WeeklyRate.mul(weeks);
        }
      
        return null;
}

If this also doesn\'t work, please send me the code for the mul() method of the WeeklyRate object.