George McCoy

And I'm back. :/ So, I'm writing a class file that interacts with a driver to get a student's info but I'm having a bit of trouble with the input validation. Basically, if I enter any ID number via the driver that doesn't start with the letter E, then the ID number should be set to the default value of E####### and if the concentration isn't CS, IT or IS, it's supposed to default to XX. But lines 17 and 29 keep throwing me the error message "Incomparable types: char and String" and the default values don't kick in so when I run the print statements in the driver, it displays an ID of "Not a valid ID" and a concentration of "Messing up Java programs" that I entered with the driver. I have no idea why it thinks there any chars in there since I declared everything as Strings. Any idea where I messed up and how to fix it?

Here's the class file:
public class Advisee { private String id; private String concentration; public Advisee () { setId("E#######"); setConcentration("XX"); }//Constructor that sets the default values public void setId (String studentId) { id = studentId; if (studentId.charAt(0) != "E") { studentId = "E#######"; } } public void setConcentration(String studentConcentration) { concentration = studentConcentration; if (concentration != "CS" || concentration != "IT" || + concentration != "IS") { concentration = "XX"; } } public String getId() { return id; } public String getConcentration() { return concentration; } }

And the driver:
public class AdviseeDriver { public static void main(String[] args) { Advisee student1 = new Advisee(); student1.setId("Not a valid Id"); student1.setConcentration("Messing up Java programs"); System.out.println(student1.getConcentration()); System.out.println(student1.getId()); } }

I knew it was something I'd feel really dumb about afterwards. :/ That's what I get for trying to code before my first cup of coffee. Thanks!

I'm trying to get a student's classification based on their completed hours but I keep getting errors. I'm kind of embarrassed asking about this since I can usually do if/else if statements with no problem but lines 5 and 8 give the errors "Illegal start of expression" and I have no idea why. I've declared the hoursCompleted and classification variables so that's not the problem.
{ if (hoursCompleted <= 29) classification = "Freshman"; else if (hoursCompleted >= 30 && <= 59) classification = "Sophomore"; else if (hoursCompleted >= 60 && <= 89) classification = "Junior"; else classification = "Senior"; }

I just finished this project but I'll probably need help in the future. Thanks!

Knute Snortum wrote:And Welcome the the Ranch. Would you like to post what you did?

Sure. I changed CustomerOrder.calcDiscount(); to orderOne.calcDiscount() and now it's working. I guess I should have posted the entire thing after all since I left out the part where I name the order. CustomerOrder orderOne = new CustomerOrder(); Oops. You all probably would have figured it out but it was still kind of dumb of me to forget that.

Never mind. I figured it out. Feel free to lock/delete this.

So, I'm working on an assignment where I have to call methods, setters and getters from a class file called CustomerOrder. CustomerOrder was written by the professor and I have to use the javadocs to decide what methods and stuff to use. The only problem I'm having is with the method calcDiscount. The javadocs info is:

Method name: calcDisocunt()
Returns: double
Purpose: Calculates the user's discount based on their discount status.


This is just the snip of code I'm having trouble with but I can post the entire thing if you want. It's kind of long and everything else is working so I didn't want to clog up the page unnecessarily.

import java.util.Scanner; public class Order { public static void main(String[] args) { System.out.println("What is your discount status? Press 0 for no discount, 1 for loyalty discount or 2 for employee discount. "); discountCode = kb.next().charAt(0); CustomerOrder.calcDiscount(); orderOne.setDiscountCode(discountCode); } }

The line

CustomerOrder.calcDiscount();

keeps giving me the error "non-static methods cannot be accessed from a static context." Any idea how to fix it? Obviously my main method is static so should I change that? I've never done that before though so I might need a bit of help if that's the solution.