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Java Java Objects Creating the MVP Conference Registration Assistant

Zahra Aljuboori
Zahra Aljuboori
619 Points

I am having problemes with starting this task

Can I add new variables to the code, and should take inspiration from the code in game class?

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;
    int whichLine = lastname.indexOf(0);
    if (whichLine) {
      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");
  }

}

2 Answers

Raffael Dettling
Raffael Dettling
32,999 Points

In the first if statmant you ceck if the firs letter is between A and M with the && operator and the charAt() methode.

 if(lastName.charAt(0) >= 'A' && lastName.charAt(0) <= 'M')

Then in the second statment check if the letter is between N and Z

    else if(lastName.charAt(0) >= 'N' && lastName.charAt(0) <= 'Z')

In Java you have to use the single quotes to signal that the letters are chars not strings :) you can of course just use an else to return 2

Zahra Aljuboori
Zahra Aljuboori
619 Points

Thanx for your fast answer, I did it my selv, my methode is a little bit different then yours.

Zahra Aljuboori
Zahra Aljuboori
619 Points

the answer is char result = lastName.charAt(0); if (result<='M'){ lineNumber=1; }else { lineNumber=2; }