macOS useDelimiter Help (Last time, promise :P)

[Maleficum]

My predicament of the day is a lack of correspondence between my file and my Scanner methods. The point of the code is to remove the "-" in the data file, then add the numbers after using the method useDelimiter.

Lab12C.Dat:

7
22-11-22-11-22
1-2-3-4-5-6
90-100-90
1000-232
1-1-1-21-1-1-111-9999-1
9-9-9-9-9-9-9-9-9-9-9-9-9-9-9-9
1

Lab12C:

 //Name -
//Date -
//Lab  -

import java.io.IOException;
import java.io.File;
import java.util.Scanner;
import static java.lang.System.*;

class Social
{
   private String socialNum;
   private int sum;

	public Social()
	{
       socialNum=""; 
        sum = 0; 

	}

	public Social(String soc)
	{
     socialNum = soc; 
     sum = 0; 

	}

	public void setWord(String w)
	{
       socialNum=w;
     setWord(w); 

	}

	public void chopAndAdd()
	{
           
         Scanner g = new Scanner(socialNum); 
          
          for(int i = 0; i<socialNum.length(); i++)
           {  
            socialNum.useDelimiter("-"); 
            sum = sum+g.nextInt(); 
            
           System.out.println(sum); 
            } 
               

	}

	public String toString()
	{
		return "";
	}
}

public class Lab12c
{
	public static void main( String args[] ) throws IOException
	{
		
		Scanner file = new Scanner(new File("lab12c.dat"));
		int size = file.nextInt(); 
	        file.nextLine(); 
	     for(int i=0; i<size; i++)
	 {  
	  String line = file.nextLine(); 
	  Social test = new Social(line); 
	 test.chopAndAdd(); 
	System.out.println(test); 
	} 









	}
}

Any help is greatly appreciated!

 

[MacFan26]

If the point was to use the useDelimeter method in Scanner, you need to use

g.useDelimiter("-"); instead of socialNum.useDelimiter("-");

Also, then comment out this line:

int size = file.nextInt();
//file.nextLine();

Since nextInt() will move it to the next line.

Finally:
Use while (g.hasNext())
Instead of for (int i = 0; i < socialNum.length(); i++)

Because you don't want to do that for the number of characters that are in the socialNum string, only while there more integers on the line.

Hope that makes sense

 

[HiRez]

Also, I think you'd want to move the useDelimiter line outside of the loop. Things that don't need to be called every pass through a loop, shouldn't be in the loop.

 

[bozigle]

I'm not sure what is really meant... and i kind of gave up on trying to make sense to what coders mean... including myself

public void chopAndAdd(){
StringTokenizer st = new StringTokenizer(socialNum,"-");
sum=0;
while (st.hasMoreTokens())
sum += Integer.parseInt(st.nextToken());
System.out.println(sum);
}



other things aside, setWord() is recursive with no condition --> infinite loop