Read large amount of data from file in Java

Question

I\'ve got text file that contains 1 000 002 numbers in following formation:

123 456
1 2 3 4 5 6 .... 999999 100000

Now I need

Answer 1

How much memory do you have in the computer? You could be running into GC issues.

The best thing to do is to process the data one line at a time if possible. Don't load it into an array. Load what you need, process, write it out, and continue.

This will reduce your memory footprint and still use the same amount of File IO