I have a Java console application that uses 2-dimensional arrays that needs to be debugged, because the application does not compile nor execute.

package u8a1_2dconsoleregisterforcourse;

import java.util.Scanner;

/** * * @author omora */ public class U8A1_2DConsoleRegisterForCourse {

/** * @param args the command line arguments */ public static void main(String[] args) { // TODO code application logic here System.out.println("Teacher's Copy"); Scanner input = new Scanner(System.in); // courses 2d array hold course code and their credit hours String[][] courses = { {"IT1006", "IT4782", "IT4789", "IT4079", "IT2230", "IT3345", "IT2249"}, {"6", "3", "3", "6", "3", "3", "6"} }; // validChoices 2d array holds valid number choices (as strings) selected by user // and their corresponding courses //e.g String[][] choices = { {"5", "IT2230"}, {"1", "IT1006"}, {"6", "IT3345"} }; String[][] validChoices = { {"", ""}, {"", ""}, {"", ""} }; int choice; int totalCredit = 0; String yesOrNo = "";

do {

choice = getChoice(courses, input); switch (ValidateChoice(choice, validChoices, totalCredit, courses)) { case -1: System.out.println("**Invalid** - Your selection of " + choice + " is not a recognized course."); break; case -2: System.out.println("**Invalid** - You have already registerd for this " + courses[0][choice-1] + " course."); break; case -3: System.out.println("**Invalid** - You can not register for more than 9 credit hours."); break; case 0: System.out.println("Registration Confirmed for course " + courses[0][choice-1] ); totalCredit += Integer.parseInt(courses[1][choice-1]); if (validChoices[0][0].equals("")) { validChoices[0][0] = Integer.toString(choice); validChoices[0] = courses[0][choice-1]; } else if (validChoices[1][0].equals("")) { validChoices[1][0] = Integer.toString(choice); validChoices[1][1] = courses[0][choice-1]; } else if (validChoices[2][0].equals("")) { validChoices[2][0] = Integer.toString(choice); validChoices[2][1] = courses[0][choice-1]; } break; }

WriteCurrentRegistration(validChoices, totalCredit); System.out.print(" Do you want to try again? (Y|N)? : "); yesOrNo = input.next().toUpperCase(); } while (yesOrNo.equals("Y"));

System.out.println("Thank you for registering with us"); }

//This method prints out the selection menu to the user in the form of //[selection number]Course Code (Course Credit Hours) //from the courses array one per line //and then prompts the use to make a number selection public static int getChoice(String[] courses, Scanner input) { System.out.println("Please type the number inside the [] to register for a course"); System.out.println("The number inside the () is the credit hours for the course"); for(int i = 0; i < courses[0].length; i++ ) System.out.println("[" + (i+1) + "]" + courses[0][i] + "(" + courses[1][i] + ")"); System.out.print("Enter your choice : "); return (input.nextInt()); }

//This method validates the user menu selection //against the given registration business rules //it returns the following code based on the validation result // -1 = invalid, unrecognized menu selection // -2 = invalid, alredy registered for the course // -3 = invalid, No more than 9 credit hours allowed // 0 = menu selection is valid public static int ValidateChoice(int choice, String[][] validChoices, int totalCredit, String[][] courses) { String choiceAsString = Integer.toString(choice); if (choice < 1 || choice > 7) return -1; else if (choiceAsString.equals(validChoices[0][0]) || choiceAsString.equals(validChoices[]) || choiceAsString.equals(validChoices[2][0])) return -2; else if ( totalCredit + Integer.parseInt(courses[1][choice-1]) > 9) return -3; return 0; } //This method prints the current list of registered courses thus far //from the courses array separated by , and enclosed inside { } //It also prints the total credit registered for thus far public static void WriteCurrentRegistration(String[][] validChoices, int totalCredit) {

if (validChoices[0][0].equals("")) System.out.println("Current course registration: { none } " ); else if (validChoices[1][0].equals("")) System.out.println("Current course registration: { " + validChoices[0][i] + " }" ); else if (validChoices[2][0].equals("")) System.out.println("Current course registration: { " + validChoices[0][1] + ", " + validChoices[1][1] + " }"); else System.out.println("Current course registration: { " + validChoices[0][1] + ", " + validChoices[1][1] + ", " + validChoices[2][1] + " }"); System.out.println("Current registration total credit = " + totalCredit); } }