Converting Long Values To String - BufferedWriter Not Printing Desired Results

Currently, my program converts Long values to String. And when I test it out, it do print out the correct output. However, when the converted String value is passed over to be written in a text file, it seems that BufferedWriter isn't printing out the outcome that it's supposed to be.

saltVs = Long.toString(saltV);
System.out.print(saltVs); //will print out 79723172

Now the problem is here...It only prints out the last digit of the String value (instead of 79723172).

Here is my FileWriter/BufferedWriter part.

Why is that when I run my program using command prompt, it prints out the output that I wanted, but however when it comes to writing to the file, it doesn't come out right.