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Java Java Objects (Retired) Creating the MVP Comparing Characters

Posted by ahmed alghafli
ahmed alghafli
3,446 Points

I have modeled an assistant for a tech conference. Since there are so many attendees, registration is broken up into two

I don't know what to do with this question pleas help me with it ?!!

I have modeled an assistant for a tech conference. Since there are so many attendees, registration is broken up into two lines. Lines are determined by last name, and they will end up in line 1 or line 2. Please help me fix the getLineFor method.

NEW INFO: chars can be compared using the > and < symbols. For instance 'B' > 'A' and 'R' < 'Z'

ConferenceRegistrationAssistant.java 
public class ConferenceRegistrationAssistant {
  private String line 1;
  private String line 2;

  public conferenceRegistrationAssistant () {
  line 1 = "";
  line 2 = "";  
  }

  public int getLineFor(String lastName) {
    /* If the last name is between A thru M send them to line 1
       Otherwise send them to line 2 */
    if(lastName.charAt('A'<'B')) {
      line 1 += lastname;
      return line 1;
    }else {
    return line 2;
    }
    int line = 0;
    return line;
  }

}

5 Answers

Rebecca Bompiani
Rebecca Bompiani
16,948 Points
Rebecca Bompiani
Rebecca Bompiani
16,948 Points

Hi Ahmed-

What they're asking for is this logic: If the first letter of lastName comes before (is less than) N, set the line to 1. Otherwise set the line to two.

In Code:

public class ConferenceRegistrationAssistant {

  public int getLineFor(String lastName) {
    /* If the last name is between A thru M send them to line 1
       Otherwise send them to line 2 */

//create a line variable
  int line = 0;

//if the first letter of the last name comes before N...
    if (lastName.charAt(0)<'N') {

      //set the line to 1
      line=1;
    } 

//otherwise...
else {

      //set the line to 2
      line=2;
    }

    //return the line the person belongs in
    return line;
  }

}
Bradley Maravalli
Bradley Maravalli
8,927 Points
Bradley Maravalli
Bradley Maravalli
8,927 Points

Thanks for the explanation! As of May 2016, this is the right answer.

Bradley Maravalli
Bradley Maravalli
8,927 Points
Bradley Maravalli
Bradley Maravalli
8,927 Points

Thanks for the explanation! As of May 2016, this is the right answer.

Bradley Maravalli
Bradley Maravalli
8,927 Points
Bradley Maravalli
Bradley Maravalli
8,927 Points

Thanks for the explanation! As of May 2016, this is the right answer.

Saad Khan Malik
Saad Khan Malik
25,199 Points
Saad Khan Malik
Saad Khan Malik
25,199 Points

This Works :)

public class ConferenceRegistrationAssistant {

  public int getLineFor(String lastName) {
       /* If the last name is between A thru M send them to line 1
       Otherwise send them to line 2 */
    int line = 0;
    char letter = lastName.indexAt(0);
    if(letter < 'M'){
      line = 1;
    } else {
     line = 2; 
    }
    return line;
  }
}
Saad Ahmed
Saad Ahmed
7,090 Points
Saad Ahmed
Saad Ahmed
7,090 Points

Salam Ahmed

The first thing you want to do in your logic is to find the first character of the name. (e.g. lastName.charAt(0) // this will only get the first letter of the last name variable (remember that array starts at 0 and not 1.)

then you want to compare the value of the first letter of the name to a fixed value (in your case, its the character 'N'). Then if it is greater than 'N' assign to line 2 and if not then assign to line one (or vice versa).

Maybe the model will help

char variable = lastName.charAt(0);

if(variable < 'N') { return lineOne; } else { return lineTwo; }

P.S. you will have to initialize the lineOne and lineTwo variables.

Hope this helps

Otis Mason
Otis Mason
794 Points
Otis Mason
Otis Mason
794 Points

thanks alot

ahmed alghafli
ahmed alghafli
3,446 Points
ahmed alghafli
ahmed alghafli
3,446 Points

thanks it helped now I kind of understand it ,