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Java Java Objects Creating the MVP Conference Registration Assistant

Amulya Arora
Amulya Arora
6,133 Points
Posted by Amulya Arora
Amulya Arora
6,133 Points

What should i do?

Plz help

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) {
    this.lastName= lastName;
    if (lastName(0) < 'M' && lastName(0) > 'A') { 
       return lineNumber = 1; 
  } 
    else (lastName(0) < 'Z' && lastName(0) > 'N') {
      return 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");
  }

}

3 Answers

Stephen Wall
PLUS
Stephen Wall
Courses Plus Student 27,294 Points
Stephen Wall
Stephen Wall
Courses Plus Student 27,294 Points

To organize the names based on the last name, you need to get the first letter of the word. So you could do this by using the charAt method and passing it the index which you know is zero. You could also change the last name to upper or lowercase or even use ignore case, to make sure that your program will still work if your user enters a last name without a capital letter at index 0. You also want to check your if statement and change the symbols to >= and <= respectively as you want to include those letters at the ends. 

// As an example
if (lastName.charAt(0) < 'M' && lastName.charAt(0) > 'A') {
// Any code in here will only run if the first letter is between 'B' and 'N'
// So you need to change the signs to >= and <= to include the letters 'A' and 'M'. 
}

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

}
Fahad Mutair
Fahad Mutair
10,359 Points
Fahad Mutair
Fahad Mutair
10,359 Points 
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 (lastName.charAt(0) <= 'M' && lastName.charAt(0) >= 'A') { 
       lineNumber = 1; 
  } 
    else if (lastName.charAt(0) <= 'Z' && lastName.charAt(0) >= 'N') {
       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;
  }
}
Amulya Arora
Amulya Arora
6,133 Points
Amulya Arora
Amulya Arora
6,133 Points

Thanks a lot Stephen and Fahad