Check Specific Value From A Specific Line From TXT File

I have some problem to understand the way to make this:

In my main class a user can save his name in a txt file (and the system initially will add 6 value equals to 0) than he can choose between 6 level and make it.

example of .txt file data:

mario 0 0 0 0 0 0
carl 0 0 0 0 0 0

AT THIS MOMENT i just made other class and they work, is this new one that is hard for me. I'm trying to make a class that:

1- (first method called verificaRisultati) take name_used and level_choosed from the main and go to check in the .txt file if that level before was done right(1) or wrong(0)

and return something like "before you made this level properly" or "before you made this level incorrectly" AND THEN let the user start with the level.

2- (second method called salvaRisultati) at the end of the level i wanna pass the result (correct/incorrect) to another method of this class that will save the value (1 or 0) associated to the user in the right position.

This is the class that i'm writing:

Java Code:

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
public class ResultUsers {

[Code] ....

I really need some hint and some code example because I'm stuck. How I can take exactly the line with the user name? How I can correctly split the line in an array and then read/modify the value for that level?