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Java Java Objects Creating the MVP Conference Registration Assistant

Schwartz Prince
PLUS
Schwartz Prince
Courses Plus Student 2,132 Points

Please help!

I don't know how to assign 1 for the letters A through M and 2 for the remaining. Also I tired this piece of code as well. But didn't work. [int lineNumber = ( indexOf(lastName) < M) ? 1: 2]. Please help me in getting this logic. Thanks in advance!

ConferenceRegistrationAssistant.java
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;
    if (indexOf(lastName) < M)
    { lineNumber += 1;}
    else {lineNumber += 2;}


   //int lineNumber = ( getLineNumberFor.indexOf(lastName) < M) ? 1: 2 ;
    /*
      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

james south
seal-mask
.a{fill-rule:evenodd;}techdegree seal-36
james south
Front End Web Development Techdegree Graduate 33,271 Points

are you using the charAt method? you can loop through a string or create a one-letter substring of a string and use charAt to compare the letter with another letter as it explains in the example. the syntax is myString.charAt(index) and it returns a letter of type char. so you could do:

String tree = "Treehouse";
char firstChar = tree.charAt(0);

firstChar now holds the value "T".

Schwartz Prince
Schwartz Prince
Courses Plus Student 2,132 Points

Thank you for getting back to me. But I couldn't find out on how to return "1" when the first letter of the lastName falls between A through M and to return "2" for the remaining. Is this somewhat we need to use Ascii numbers like >065 || <077?

Schwartz Prince
Schwartz Prince
Courses Plus Student 2,132 Points

public int getLineNumberFor(String lastName) { int lineNumber = 0; if (lastName.charAt(0) = **[a-m] )** { int lineNumber = 1;} else { int lineNumber = 2;}

this is the point where I got stuck and don't know the logic on grouping. Please help