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A simple question from a Java newbie

Posted on 2008-10-08
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Last Modified: 2013-11-23
Hi there,

I have just started learning to write Java and I'm stumped already!

I have to write a short program that asks the user to type their name in full.  The assumption is that their full name comprises of 3 names.  The first initial of each name should then be displayed.

eg, 'Please enter your full name' ~: Flo The Minx
F T M

 The tutorial that I am working from tells me to use the string methods to work out where the first and last spaces are.

Here is what I have so far... (I know it's wrong because the answer it displays is '123')

Also, I brief explanation of the answer would be appreciated as I am trying to learn and I won't learn without knowing how it works, thanks


//Print initials
 
import java.util.*;
 
public class Initials
{
  public static void main (String[]args)
  {
    //create Scanner to read from keyboard
    
   Scanner myKeyboard = new Scanner(System.in);
   
   //ask for name
   System.out.print("Please enter your full name~: ");
   String name = myKeyboard.nextLine();
   
   System.out.print((name.charAt(0)) + (name.indexOf(' ') + 1));
   }
 }

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Question by:flo_the_lil_minx
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Accepted Solution

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contactkarthi earned 2000 total points
ID: 22670624
the print statement should be

 System.out.println((name.charAt(0)) +" " + name.charAt(name.indexOf(' ') + 1) + " " + name.charAt(name.lastIndexOf(' ') + 1));
 
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Author Closing Comment

by:flo_the_lil_minx
ID: 31504311
Thanks for that, I'm glad to see I wasn't that far off (ish)
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Author Comment

by:flo_the_lil_minx
ID: 22670735
So I guess what the code is saying in simplistic terms..

System.out.println((name.CharAt(0))
print out the first character of the String name then

name.charAt(name.indexOf(' ') + 1)
print out the character that is one more than the first space

and finally print out the character that is one more than the last space?
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LVL 17

Expert Comment

by:contactkarthi
ID: 22670848
this print statement ssumes that there are 2 blank spaces..

as you sait chatAt(0) prints the first character

name.charAt(name.indexOf(' ') + 1) will print the character next to the first space

name.lastIndexOf(' ') + 1) will print the character after the last space..


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Author Comment

by:flo_the_lil_minx
ID: 22670901
Thanks!
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