Changing Value In Specific Point Of Specific Line In TXT File

So here we go with my problem:

- from the main class will arrive three variable (String name_used, int level_choose, int level_result)

I have a .txt file with this kind of formatting:

mario 1 1 0 1 0 1
carlo 0 0 0 1 1 0
...

Where I use 1 and 0 in the main for write if the level (you see that the numbers are always sixr? are egual to six level existing) BEFORE is done correct or wrong

- when in the main a user make a level a feedback coming back from the class level saying if the user made the count correctly or wrong. and i wanna replace the value (1 or 0) in the txt file with the new level result.

So i have all what i need as parameters i think.

name_used to look for the correct line in .txt file with .indexOf
level_choosed to go throught the correct index of that line
level_result (1 or 2) to be replaced with the existing one

Java Code:

public void salvaRisultati(String name_used, int level_choosed, int result_of_level) throws FileNotFoundException{
}
} mh_sh_highlight_all('java');