Question

Please help me with my JAVA programming Exercise.

a. The Talk-A-Lot Cell Phone Company provides phone services for its customers. Create an abstract class named PhoneCall that includes a String field for a phone number and a double field for the price of the call. Also include a constructor that requires a phone number parameter and that sets the price to 0.0. Include a set method for the price. Also include three abstract get methods—one that returns the phone number, another that returns the price of the call, and a third that displays information about the call. Create two child classes of PhoneCall: IncomingPhoneCall and OutgoingPhoneCall. The IncomingPhoneCall constructor passes its phone number parameter to its parent’s constructor and sets the price of the call to 0.02. The method that displays the phone call information displays the phone number, the rate, and the price of the call (which is the same as the rate). The OutgoingPhoneCall class includes an additional field that holds the time of the call in minutes. The constructor requires both a phone number and the time. The price is 0.04 per minute, and the display method shows the details of the call, including the phone number, the rate per minute, the number of minutes, and the total price. Write an application that demonstrates you can instantiate and display both IncomingPhoneCall and OutgoingPhoneCall objects. Save the files as PhoneCall.java, IncomingPhoneCall.java, OutgoingPhoneCall.java, and DemoPhoneCalls.java.

b. Write an application in which you assign data to a mix of 10 IncomingPhoneCall and OutgoingPhoneCall objects into an array. Use a for loop to display the data. Save the file as PhoneCallArray.java.

Code Source:

IncomingPhoneCall:

public class IncomingPhoneCall extends PhoneCall
{
public final static double RATE = .02;
public IncomingPhoneCall(String num)
{
super(num);
price = RATE;
}
public void getInfo()
{
System.out.println("Incoming phone call " +
getPhoneNumber() + " " + RATE + " per call. Total is $" +
+ getPrice());
}
public String getPhoneNumber()
{
return phoneNumber;
}
public double getPrice()
{
return price;
}
}

OutgoingPhoneCall:

public class OutgoingPhoneCall extends PhoneCall
{
public final static double RATE = .04;
private int minutes;
public OutgoingPhoneCall(String num, int mins)
{
super(num);
minutes = mins;
price = minutes * RATE;
}
public void getInfo()
{
System.out.println("Outgoing phone call " +
getPhoneNumber() + " " + RATE +
" per minute at " + minutes +
" minutes. Total is $" +
getPrice());
}
public String getPhoneNumber()
{
return phoneNumber;
}
public double getPrice()
{
return price;
}
}

PhoneCallArray:

public class PhoneCallArray
{
public static void main(String[] args)
{
PhoneCall calls[] = new PhoneCall[10];
int i;
calls[0] = new IncomingPhoneCall("345-094-8372");
calls[1] = new OutgoingPhoneCall("644-564-8572", 4);
calls[2] = new IncomingPhoneCall("343-194-3372");
calls[3] = new OutgoingPhoneCall("655-999-6372", 10);
calls[4] = new IncomingPhoneCall("545-065-2362");
calls[5] = new OutgoingPhoneCall("655-999-6372", 30);
calls[6] = new IncomingPhoneCall("125-345-4857");
calls[7] = new OutgoingPhoneCall("235-955-1371", 3);
calls[8] = new IncomingPhoneCall("644-564-8572");
calls[9] = new OutgoingPhoneCall("920-787-8919", 5);
for(i = 0; i < calls.length; ++i)
calls[i].getInfo();
}
}

PhoneCall:

public abstract class PhoneCall
{
String phoneNumber;
double price;
public PhoneCall(String num)
{
phoneNumber = num;
price = 0.0;
}
public void setPrice(double pr)
{
price = pr;
}
public abstract String getPhoneNumber();
public abstract double getPrice();
public abstract void getInfo();
}

DemoPhoneCalls:

public class DemoPhoneCalls
{
public static void main(String[] args)
{
IncomingPhoneCall inCall = new IncomingPhoneCall("212-555-3096");
OutgoingPhoneCall outCall = new OutgoingPhoneCall("312-874-0232", 10);
inCall.getInfo();
outCall.getInfo();
}
}

Please copy and paste your code after you finish.