scjp page 506 question 14 doubt

[pras]

package sdm;

import java.util.Scanner;

public class Brain {
public static void main(String args[]) {
Scanner sc=new Scanner("123 A 3b c,45,x5x,76 82 L");
while(sc.hasNext()) {
if(sc.hasNextInt())
System.out.print(sc.nextInt() + " ");
else sc.next();

}
}
}
/**** Doubt**************/

why is the output 123 82 when we have other numbers in between

[Bert Bates]

Hey Prasanna,

We're always trying to improve the book, so I'd be interested in knowing if you understood the discussion on pages 487-489? If not, where did you get lost?

Thanks,

Bert

[Jesper de Jong]

Scanner breaks the input up into tokens separated by spaces. So the string "123 A 3b c,45,x5x,76 82 L" is split up into:

123
A
3b
c,45,x5x,76
82
L

Of those, only 123 and 82 are numbers. So sc.hasNextInt() will only return true for those tokens, and false for the other tokens.

[pras]

45 and 76 are also numbers...what happens there?

[pras]

hi Bert ,
i understood the logic in page 487

and probably i got the hint from jespers reply

ie whitespace is taken as delimiter so the value returned!!