Integer.parselnt did not used to be. I have always been in the habit
of doing a trim() beforehand so I have not noticed if that has
changed.

It seems you are trying to convert the String "1 5 79 86 4 5 " to
Integer.

You should first cut each of those numbers, and then convert it to
integer

Try something similar to this :

String input = "1 5 79 86 4 5 ";
String numbers[] = input.split(" ");

int aNumber;
for(int i=0; i<numbers.length; i++){
  aNumber = Integer.parseInt ( numbers[i] ) ;
}

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You have not shown us any code, so I have to guess what you wrote.
This is like refusing to disrobe at the doctor's.

Integer.parseInt is designed to handle only one number.  It has no way
of handling six at once and cramming them all into one int.

So you have to spoon feed the numbers one at a time to it.

This means you somehow have to get 6 tiny Strings, each containing one
number, then feed them one at a time to Integer.parseInt, e.g. using a
loop that runs over the array of strings.

The easiest way to split them up is  with the regex split method using
' ' as your splitter.  See http://mindprod.com/jgloss/regex.html

You can also do it with a StringTokenizer or a charAt( i ) loop. Your
classmates have all posted this question several times earlier.  You
might look for clues in those answers.

I am not going to show you the detailed answer since you would learn a
lot less that way.