OutOfMemoryError when trying to read/write from a huge text file

Question

I\'m trying to read/write a huge text file. But when I try to do that I get the error:

Exception in thread \"main\" java.lang.OutOfMemoryError: Java heap space
          


        

Answer 1

Don't try to read large files into memory. They don't fit. Find a way of processing the file a line at a time, or a record at a time, or a chunk at a time. I can't see any reason here why you can't do that.

Calling File.exists() and File.createNewFile() immediately before constructing a FileWriter around the same File is a complete waste of time.