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

I would extend FilterReader and parse the string as it is read in the read() method. Have a getNextNumber method return the numbers. Code left as an exercise for the reader.