Can someone please help?

Question

I am a student doing the Bachelor of Education at CSU, via the Accelerated Teacher Training Program, by distance ed. My area is Computing and IT, and as part of my course I have to do a basic Java subject. (ITC129 - if that means anything to you).
I have attended the residental school, but did'nt find it very helpful, and now I am trying to compose what should be a very simple piece of code for an assignment.
Im finding it VERY frustrating, because I seem to be be missing a very basic piece of understanding.
this is the question...
In a particular mobile plan, local calls between 700 hours and 1900 hours are charged at $0.60 per minute. Long distance calls (to places over 100km away) during these hours are charged at $1.10 a minute. At other times calls are charged at half the normal rate.
A program is required which calculates the total cost of a arbitrary number of calls. for each call, the user enters a time value (in 24 hour format), a distance (in Kms) and a call length (in minutes). The program then displays the cost of that call and also adds the cost onto a cumulative total.
When the user has no more to process, they enter a value of -999 instead of a legal time. when the program reads this sentinel value it displays the total cost of all the calls and ends.
would one of you clever people please look at what I have (incomplete, obviously) so far, and tell me what I'm doing wrong? I feel like such an idiot....
class Assignment2
{// begin class
     public static final
     void main(String[]argv)
     {// begin main
          KeyboardReader kb=new KeyboardReader();
          double charge, newCharge, totalCharge;
          int callTime, dist, dur;
          System.out.println("\n\t\tTo exit, enter a time value of -999 ");
          System.out.print("\n\t\tPlease enter the time the call was made ");
          System.out.print("\n\t\t(in 24 hour format). ");
          callTime=kb.getInt();
          System.out.print("\n\t\tPlease enter the distance from point to point ");
          System.out.print("\n\t\tof the call (in Kms). ");
          dist=kb.getInt();
          System.out.print("\n\t\tPlease enter the duration of the call");
          System.out.print("\n\t\t(in minutes). ");
          dur=kb.getInt();
          errorCheck();
          writeData();
          calcCost();
          totalCharge();
          }//end main
     static
     void writeData()
          System.out.println("\n\t\tThe time of the call was "+callTime+" hours.");
          System.out.println("\n\t\tThe distance of the call was "+dist+" Kms.");
          System.out.println("\n\t\tThe duration of the call was "+dur+" minutes.");
     static
     void errorCheck()
          if (callTime>2400)
               System.out.print("Sorry, but there are only 24 hours in a day,/n/n/tPlease try again.");
          if (callTime==(int)'-999')
               System.exit(0); //ends the program - worked in Assignment 1, for some reason it dosn't like this line now.
          if (callTime<=0)
               System.out.print("Sorry, can't have negative hours./n/n/tPlease try again.");     
     static
     void calcCost()
          if ((callTime>=1700)&&(callTime<=1900))
               newCharge=(callTime*(dur*.06));
          if (dist>=100)
               newCharge=(callTime*(dur*1.1));
          else
               newCharge=(callTime*(dur*0.55));     
          totalCharge=(totalCharge+newCharge);     
     static
     void totalCharge()     
          System.out.println("\n\t\tThe cost of your call is "+totalCharge+".");     
}// end class
Thank you so much for perservering with this question...
Cathy

Answer 1

class Assignment2 {
     static double charge, newCharge, totalCharge;
     static int callTime, dist, dur;
     public static final void main(String[]argv) {
          KeyboardReader kb=new KeyboardReader();
          System.out.println("\n\t\tTo exit, enter a time value of -999 ");
          System.out.print("\n\t\tPlease enter the time the call was made ");
          System.out.print("\n\t\t(in 24 hour format). ");
          callTime=kb.getInt();
          System.out.print("\n\t\tPlease enter the distance from point to point ");
          System.out.print("\n\t\tof the call (in Kms). ");
          dist=kb.getInt();
          System.out.print("\n\t\tPlease enter the duration of the call");
          System.out.print("\n\t\t(in minutes). ");
          dur=kb.getInt();
          errorCheck();
          writeData();
          calcCost();
          totalCharge();
     static void writeData() {
          System.out.println("\n\t\tThe time of the call was "+callTime+" hours.");
          System.out.println("\n\t\tThe distance of the call was "+dist+" Kms.");
          System.out.println("\n\t\tThe duration of the call was "+dur+" minutes.");
     static void errorCheck() {
          if (callTime>2400)
          System.out.print("Sorry, but there are only 24 hours in a day,/n/n/tPlease try again.");
          if (callTime==Integer.parseInt("-999"))
          System.exit(0); //ends the program - worked in Assignment 1, for some reason it dosn't like this line now.
          if (callTime<=0)
          System.out.print("Sorry, can't have negative hours./n/n/tPlease try again.");
     static void calcCost() {
          if ((callTime>=1700)&&(callTime<=1900))
          newCharge=(callTime*(dur*.06));
          if (dist>=100)
          newCharge=(callTime*(dur*1.1));
          else
          newCharge=(callTime*(dur*0.55));
          totalCharge=(totalCharge+newCharge);
     static void totalCharge() {
          System.out.println("\n\t\tThe cost of your call is "+totalCharge+".");
}Try this and get an idea!
xH4x0r