Java.lang.numberformatesception: for input string: ""

See more:

Java

collections

string

Hello,

The code for buffered reader that reads numbers from file and sorts them is:

package inout;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class BufferedReaderFrmFile 
{

	public static void main(String[] args) throws IOException {
			
                        
                        BufferedReader br = new BufferedReader(new FileReader("F:\\nu.txt"));
                        List<Integer> numbers = new ArrayList<Integer>();
                        String line = null;                        

                        while ((line = br.readLine()) != null) {
                        String []strNumbers = line.split(" ");
                        for(String strNumber : strNumbers){
                        numbers.add(Integer.parseInt(strNumber));
                    }         
     }   
     br.close();

     Collections.sort(numbers);
     System.out.println(numbers);
        }
}

the program gives the error

java.lang.NumberFormatEsception: For input string: ""

nu.txt has numbers
12 12 12 857 85 3 8 6 8 56 23 45 89 23 23 02 15
45 41 56 56 89 56 23 45 56 23 45 78 56 45 23

What I have tried:

changed code and the type of source file