Thread: Sum from a file

Hi guys,

below I make one program to read in one column the strings and the second column the int:

import java.io.File;
import java.util.Scanner;
 
 
public class Main {
 
	private Scanner x;
 
		public void openFile(){
			try{
				x=new Scanner(new File("myfile.txt"));
			}
			catch (Exception e){
					System.out.println("Could not find file");
								}
		}
public void readFile(){
 
int loop=0;
			do{
 
			x.hasNext();
			String a= x.next();
			int b=x.nextInt();
 
			System.out.printf("%s %s\n",a,b);
			loop++;			
			}while (loop<10);}
 
public void closeFile(){
	x.close();
}
}

The file includes 10 lines and 2 columns and is like this:

abc 12
def 234
rrt 333

..
..
..

Now what I need is to sum all int of the 2 column. So I try to make some small changes to :

import java.io.File;
import java.util.Scanner;
 
 
public class ReversePartA {
 
    private Scanner x;
 
        public void openFile(){
            try{
                x=new Scanner(new File("myfile.txt"));
            }
            catch (Exception e){
                    System.out.println("Could not find file");
                                }
        }
public void readFile(){
int j=0;
int sum=0;
int loop=0;
            for(j=0; j<=10; j++){
 
            x.hasNext();
            String a= x.next();
            int b=x.nextInt();
            sum +=b;
 
 
            }System.out.println(sum);}
 
 
 
public void closeFile(){
    x.close();
}
}

the results of sum from this program is crazy. Any ideas?

Read the whole line as a String, and then parse the String into two parts using the split() method. Please don't store the results in parallel arrays. Create a class instead.