How to convert large numbers in a text file (strings) into ints and add them. : 3123123123123 759345 903470283

1839282039485028304849404 3839282039485028304849404 

22 32 

9888 9233

93373849503817264 38394058293045859 38394932293045859 93373849503817264 

38394058293045859

90349329492349      0

94840

10000000000000000000 600000

32453 325235 32

100 0

34 

0

0  0  0

This is the text file I am working with. I need to convert these into ints and add them. I haven't learned parseInt yet, so unless there's any way around it, i'd like to know how to convert these into ints and sum them in each line. 
