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Java Java Objects Creating the MVP Conference Registration Assistant

lauren Townsend
lauren Townsend
643 Points

ConferenceRegistrationAssistant

I am not sure how to set this up. I thought I could look for a character and then create an if else statement that requires the char that was input to exists in one of two categories: Line 1 or Line 2. However, when I tried to write the if else statement the workspace did not like that. Cna anyone help?

ConferenceRegistrationAssistant.java
import java.util.Scanner;
public class ConferenceRegistrationAssistant {

  /**
   * Assists in guiding people to the proper line based on their last name.
   *
   * @param lastName The person's last name
   * @return The line number based on the first letter of lastName
   */
  public int getLineNumberFor(String lastName) {
    int lineNumber = 0;
    Scanner scanner = new Scanner(System.in);
        System.out.print("Enter a lastname:  ");
        Integer lastName = scanner.nextLine();
        char lastName = lastName.charAt(0);
        return example.applyLineNumber(lastname);
    /*
      lineNumber should be set based on the first character of the person's last name
      Line 1 - A thru M
      Line 2 - N thru Z

     */
    return lineNumber;
  }

}
Example.java
public class Example {

  public static void main(String[] args) {
    /*
      IMPORTANT:  You can compare characters using <, >. <=, >= and == just like numbers
     */
    if ('C' < 'D') {
      System.out.println("C comes before D");
    }

    if ('B' > 'A') {
      System.out.println("B comes after A");
    }

    if ('E' >= 'E') {
      System.out.println("E is equal to or comes after E");
    }

    // This code is here for demonstration purposes only...
    ConferenceRegistrationAssistant assistant = new ConferenceRegistrationAssistant();
    /*
      Remember that there are 2 lines.
      Line #1 is for A-M
      Line #2 is for N-Z
     */
    int lineNumber = 0;
    /*
      This should set lineNumber to 2 because
      The last name is Zimmerman which starts with a Z.
      Therefore it is between N-Z
     */
    lineNumber = assistant.getLineNumberFor("Zimmerman");

    /*
      This method call should set lineNumber to 1, because 'A' from "Anderson" is between A-M.
     */
    lineNumber = assistant.getLineNumberFor("Anderson");

    /*
      Likewise Charlie Brown's 'B' is between 'A' and 'M', so lineNumber should be set to 1
     */
    lineNumber = assistant.getLineNumberFor("Brown");
  }

}

1 Answer

Hi Lauren,

You need to pick up the first character of the lastName using charAt(0) then decide if it is 'greater' or 'lesser' than 'M'. If the former, make line equal to 1, else line equals 2. Return line out of the method.

Have a look at this post I wrote a while ago that goes into more detail.

Let me know how you get on. :+1:

Steve.

lauren Townsend
lauren Townsend
643 Points

Yes, this was very helpful and I was able to get it to work. Thank you for your help!

Glad it helped. :+1: