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I am trying to get an output that looks like this:

1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9

1234

5678

9012

3456

789

The first line being a String of numbers (line) and the last line being all of the numbers printed out in increments of 4 (breaker). Here is the code I got so far (I am using two different files or programs or whatever because of my teacher).

import java.util.Scanner;

import static java.lang.System.*;

public class LineBreaker 

 private String line;
 private int breaker;

 public LineBreaker() 
 this("", 0);
 

 public LineBreaker(String s, int b) 
 line=s;
 breaker=b;
 

 public void setLineBreaker(String s, int b) 
 line=s;
 breaker=b;
 

 public String getLine() 
 return line;
 

 public String getLineBreaker() 
 String box = "";
 Scanner chopper = new Scanner(line);
 while (chopper.hasNext())
 for (int i=0;i<breaker;i++)
 box+=chopper.next();
 
 box=box+"n";
 
 return box;
 

 public String toString() 
 return getLine()+"n"+getLineBreaker()+"n";
 

(the next one is in the separate file)

import java.util.Scanner;

import static java.lang.System.*;

public class LineBreakerRunner 

 public static void main(String args) 
 LineBreaker test = new LineBreaker("1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9",4);
 System.out.println(test);
 

Here is the error message that I am getting:

Exception in thread "main" java.util.NoSuchElementException
 at java.util.Scanner.throwFor(Scanner.java:862)
 at java.util.Scanner.next(Scanner.java:1371)
 at lab12_scanner_chopper.LineBreaker.getLineBreaker(LineBreaker.java:41)
 at lab12_scanner_chopper.LineBreaker.toString(LineBreaker.java:49)
 at java.lang.String.valueOf(String.java:2994)
 at java.io.PrintStream.println(PrintStream.java:821)
 at lab12_scanner_chopper.LineBreakerRunner.main(LineBreakerRunner.java:16)
C:UsersHarrisonAppDataLocalNetBeansCache8.2executor-snippetsrun.xml:53: Java returned: 1
BUILD FAILED (total time: 0 seconds)

The error is pointing to the line in LingBreaker where it says box+=chopper.next(); So I think that the problem is me adding the chopped bit to a string. But I don't really get why that is a problem. I need to use a Scanner/chopper to get credit.

That is a lot of code for what appears to be a simple problem. I would print the String. I would use a regular expression to remove all of the white space. Then I would iterate the input and increment by 4 characters at a time. Like,

String s = "1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9", s1 = s.replaceAll("\s+", "");
int len = s1.length();
System.out.println(s);
for (int i = 0; i < len; i += 4) 
 System.out.print(s1.charAt(i));
 if (i + 1 < len) 
 System.out.print(s1.charAt(i + 1));
 
 if (i + 2 < len) 
 System.out.print(s1.charAt(i + 2));
 
 if (i + 3 < len) 
 System.out.print(s1.charAt(i + 3));
 
 System.out.println();

Outputs (as requested)

1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
1234
5678
9012
3456
789

And if you need same with a Scanner then (for the same result), do something like

String s = "1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9";
System.out.println(s);
Scanner sc = new Scanner(s);
while (sc.hasNextInt()) 
 System.out.print(sc.nextInt());
 if (sc.hasNextInt()) 
 System.out.print(sc.nextInt());
 
 if (sc.hasNextInt()) 
 System.out.print(sc.nextInt());
 
 if (sc.hasNextInt()) 
 System.out.print(sc.nextInt());
 
 System.out.println();