Question

Add the method getTelephoneNeighbor to the SmartPhone class. Make this method return a version of the phone number that's incremented.

Given Files:

public class Demo4 {

    public static void main(String[] args) {
        SmartPhone test1 = new SmartPhone("Bret", "1234567890");
        SmartPhone test2 = new SmartPhone("Alice", "8059226966", "[email protected]");
        SmartPhone test3 = new SmartPhone();
        SmartPhone test4 = new SmartPhone("Carlos", "8189998999", "[email protected]");
        SmartPhone test5 = new SmartPhone("Dan", "8182293899", "[email protected]");

        System.out.print(test1);
        System.out.println("Telephone neighbor: " + test1.getTeleponeNeighbor());
        System.out.println();

        System.out.print(test2);
        System.out.println("Telephone neighbor: " + test2.getTeleponeNeighbor());
        System.out.println();

        System.out.print(test3);
        System.out.println("Telephone neighbor: " + test3.getTeleponeNeighbor());
        System.out.println();

        System.out.print(test4);
        System.out.println("Telephone neighbor: " + test4.getTeleponeNeighbor());
        System.out.println();

        System.out.print(test5);
        System.out.println("Telephone neighbor: " + test5.getTeleponeNeighbor());
        System.out.println();
    }

}

And:

public class Phone
{
    protected String name;
    protected long number;

    public Phone() {
        this("None", -1);
    }

    public Phone(String name) {
        this(name, -1);
    }

    public Phone(String name, long number) {
        this.name = name;
        this.number = number;
    }

    public String getName() {
        return name;
    }

    public long getNumber() {
        return number;
    }
}

And:

public class SmartPhone extends Phone
{
    private String email;
    private String phone;
    private String phone2;

    public SmartPhone()
    {
        super("None",-1);
        phone = "Not set";
        email = "None";
        phone2 = "Not set";
    }

    public SmartPhone(String name, String phone)
    {
        super(name, Long.parseLong(phone));
        this.phone = phone;
        this.email = "None";
    }

    public SmartPhone(String name, String phone, String email)
    {
        super(name, Long.parseLong(phone));
        this.email = email;
        this.phone = phone;
    }

    public boolean hasPhoneNumber()
    {
        return !phone.equals("Not set");
    }

    public String getAreaCode()
    {
        return phone.substring(0,3);
    }

    public String getPrefix()
    {
        return phone.substring(3,6);
    }

    public String getLineNumber()
    {
        return phone.substring(6);
    }

    public String toString()
    {
        return "Name: " + name + "\n" +
                "Phone: " + phone + "\n" +
                "Email: " + email + "\n";
    }
}

///////////////// Output /////////////////

Name: Bret\n
Phone: 1234567890\n
Email: None\n
Telephone neighbor: (123) 456-7891\n
\n
Name: Alice\n
Phone: 8059226966\n
Email: [email protected]\n
Telephone neighbor: (805) 922-6967\n
\n
Name: None\n
Phone: Not set\n
Email: None\n
Telephone neighbor: Cannot calculate phone number neighbor\n
\n
Name: Carlos\n
Phone: 8189998999\n
Email: [email protected]\n
Telephone neighbor: (818) 999-9000\n
\n
Name: Dan\n
Phone: 8182293899\n
Email: [email protected]\n
Telephone neighbor: (818) 229-3900\n
\n

Answer 1

code:

public class SmartPhone extends Phone
{
private String email;
private String phone;
private String phone2;

public SmartPhone()
{
super("None",-1);
phone = "Not set";
email = "None";
phone2 = "Not set";
}

public SmartPhone(String name, String phone)
{
super(name, Long.parseLong(phone));
this.phone = phone;
this.email = "None";
}

public SmartPhone(String name, String phone, String email)
{
super(name, Long.parseLong(phone));
this.email = email;
this.phone = phone;
}

public boolean hasPhoneNumber()
{
return !phone.equals("Not set");
}

public String getAreaCode()
{
return phone.substring(0,3);
}

public String getPrefix()
{
return phone.substring(3,6);
}

public String getLineNumber()
{
return phone.substring(6);
}

public String toString()
{
return "Name: " + name + "\n" +
"Phone: " + phone + "\n" +
"Email: " + email + "\n";
}

   public String getTeleponeNeighbor() {
       if(phone == "Not set"){
           return "Cannot calculate phone number neighbor";
       }else{
           String res = "(";
           res+=phone.substring(0,3)+")";
           res+=phone.substring(3,6)+"-";
           res+=Integer.parseInt(phone.substring(6,10))+1;
          
           return res;
       }
   }
}