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Thread: Help with code

  1. #26
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    Default Re: Help with code

    Have you attempted to use a switch statement for your menu?

  2. The Following User Says Thank You to Bake1tEazy For This Useful Post:

    Hallowed (January 25th, 2011)

  3. #27
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    Default Re: Help with code

    and what is your overall code so far?

  4. #28
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    Default Re: Help with code

    I'm unfamiliar with how to use a switch statement.

    This is my overall code. It's working except for #2 there is some error in the way it searches through the array. I'm trying to find it. jk. i found it and fixed it
    package ArrayList;
     
    import java.util.Scanner;
     
    import java.util.ArrayList;
     
    public class Menu {
     
    	public static void main(String[] args) {
     
    		ArrayList<Student> studentRecords = new ArrayList<Student>(); // creates
    																		// array
    																		// list
     
    		System.out.println("Welcome!");
     
    		int UR = 0; // user Response 1
     
    		System.out.println("Please type the number of the task you would like to perform.");
    		System.out.println("1. Add a student");
    		System.out.println("2. Find a student");
    		System.out.println("3. Delete a student");
    		System.out.println("4. Display all students");
    		System.out.println("5. Display the total number of students");
    		System.out.println("6. Exit");
     
    		while (UR != 6) {
     
    			Scanner input = new Scanner(System.in); // ask for user response.
    			UR = input.nextInt(); // set UR equal to the users response.
     
    			if (UR == 1) {
    				System.out.println("Enter Firstname:> ");
    				String forename = "";
    				while (forename.isEmpty()) {
    					forename = input.nextLine();
    				}
     
    				System.out.println("Enter Surname:> ");
    				String surname = "";
    				while (surname.isEmpty()) {
    					surname = input.nextLine();
    				}
     
    				System.out.println("Enter Student Number:> ");
    				int studNo = -1;
    				while (studNo < 0) {
    					studNo = input.nextInt();
    				}
     
    				System.out.println("Enter Major:> ");
    				String studentMajor = "";
    				while (studentMajor.isEmpty()) {
    					studentMajor = input.nextLine();
    				}
     
    				System.out.println("Enter GPA:> ");
    				double gpa = -1.0;
    				while (gpa < 0) {
    					gpa = input.nextDouble();
    				}
     
    				Student newStudent = new Student(forename, surname, studNo,
    						studentMajor, gpa);
     
    				studentRecords.add(newStudent); // adds newStudent to the
    												// arraylist.
     
    				System.out.print("Success! ");
    				System.out.print(newStudent.getForeName());
    				System.out
    						.println("'s account has been created with the following information:"); // Print
    																									// verification.
    				System.out.println(newStudent);
    			}
     
    			if (UR == 2) {
    				int positionOfStudent = 0;
    				System.out.println("Enter a student name.");
    				String studentName = "";
     
    				while (studentName.isEmpty())
    				{
    				studentName = input.nextLine();
    				}
     
    				boolean found = false;
    				int i = 0;
    				while (found == false &&  positionOfStudent < studentRecords.size())
    				{
    				if (studentName.equalsIgnoreCase(studentRecords.get(i).getForeName()))
    				{
    				System.out.println("Student " + studentName + " found at position " + positionOfStudent + ".");
    				found = true;
    				}
     
    				else
    				{
    				positionOfStudent++;
                                    i++;
     
    				}
    				}
     
    				if (found == false)
    				System.out.println("Student not found.");
     
    				else
    				System.out.println(studentRecords.get(positionOfStudent).toString());
     
    				}
     
    			if (UR == 3) {
    				System.out.println("Enter the position of the student to remove.");
     
    				int position = input.nextInt();
     
    				if (position < 0 || position >= studentRecords.size())
    				{
    				System.out.println("Impossible");
    				}
     
    				else
    				{
    				studentRecords.remove(position);
    				}
     
     
    				}
     
    			if (UR == 4) {
    				for (Student s : studentRecords) {
    					System.out.println(s);
    				}
    			}
     
    			if (UR == 5) {
    				System.out.println("The total number of students is: " + studentRecords.size());
     
    			}
     
    			if (UR == 6) {
    				System.out.println("Good bye!");
    				System.exit(0);
    			}
    			System.out.println("Please select 1-6, to see the menu enter: 0");
    			if (UR == 0){
    				System.out.println("Please type the number of the task you would like to perform.");
    				System.out.println("1. Add a student");
    				System.out.println("2. Find a student");
    				System.out.println("3. Delete a student");
    				System.out.println("4. Display all students");
    				System.out.println("5. Display the total number of students");
    				System.out.println("6. Exit");
    			}
    		}
    	}
    }
    package ArrayList;
     
    public class Student {
     
        private String fName;
        private String lName;
        private int sNumber;
        private String major;
        private double gpa;
        static int count;
     
        public Student(String fName, String lName, int sNumber, String major, double gpa) {
            this.fName = fName;
            this.lName = lName;
            this.sNumber = sNumber;
            this.major = major;
            this.gpa = gpa;
     
            count++;//increment when object is created
        }
     
        //setter methods
        public void setForeName(String name) {
            fName = name;
        }
     
        public void setLastName(String lastName) {
            lName = lastName;
        }
     
        public void setStudentNumber(int sNo) {
            sNumber = sNo;
        }
     
        public void setMajor(String maj) {
            major = maj;
        }
     
        public void setGPA(double val) {
            gpa = val;
        }
     
        //getter methods - use to return values
        public String getForeName() {
            return fName;
        }
     
        public String getLastName() {
            return lName;
        }
     
        public int getStudentNumber() {
            return sNumber;
        }
     
        public String getMajor() {
            return major;
        }
     
        public double getGPA() {
            return gpa;
        }
     
        public static int getCount() {
            return count;
        }
     
        @Override
        public String toString() {
            return String.format("First name: %s, Last name: %s, Student "
                    + "Number: %d, Major: %s, GPA: %.2f", fName, lName, sNumber, major, gpa);
        } //called automatically when you attempt to print an object - System.out.println(myObject);
    }
    Last edited by Hallowed; January 25th, 2011 at 11:26 PM.

  5. #29
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    Default Re: Help with code

    Wow this all finally works and for the most part I understand it all.
    Thanks so much for everyone's help.
    ...Now I should probably rebuild this on my own sometime just to make sure I can. =P

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