This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Is it possible to read/write (using a stream maybe?) from a file without actually loading the whole thing into the JVM?
I am used to loading the whole file into memory but I realize if a file becomes to large it will hog resources. Is there any way I can maintain low memory usage and the ability to constantly read/write data?
By default, FileInputStream and FileReader don't store more than a few kilobytes. Just keep on calling on of the read methods (or readLine() if you've wrapped them in a BufferedReader) and process the bytes / chars / lines directly instead of storing them.