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Java Java Objects Creating the MVP Conference Registration Assistant

Tal Tzabari
Tal Tzabari
2,050 Points

i'm lost :'(

please helppp i'm stuck for hours

ConferenceRegistrationAssistant.java
public class ConferenceRegistrationAssistant {
  public String aToM = "abcdefghijklm";
  /**
   * 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) {
    boolean  firstLetter = aToM.indexOf(lastName.charAt(0)) != -1;
    if (firstLetter) {
      int lineNumber = 1;
    }else{
      int lineNumber = 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");
  }

}
Carlos Vallejo
Carlos Vallejo
11,821 Points

Hi Tal

you only need to compare the first character for the last name, and for that you can use charAt method something like this:

if(lastName.charAt(0) >= 'A' && lastName.charAt(0) <= 'M'){ lineNumber=1; } else{ lineNumber=2; }

Tal Tzabari
Tal Tzabari
2,050 Points

thanks but actully my code was also right but i had troublr with lineNumber because i needed to int it at the head of the class and then manipulate it by 1 or 2 without int