exception while Read very large file > 300 MB

Question

My task is to open a large file in READ&WRITE mode and i need to search some portion of text in that file by searching starting and end

Answer 1

Does your search pattern match more than one line? If not then the easiest solution is to read line by line :). Simple really

But if the search pattern matches multiple lines then you need to let us know because searching line by line will not work.