Tag: file-processing

How to use iterator pattern in java to load file into hashmap in batches

I have a large file containing two million lines . I’m looking to traverse through each line of the file and, process it into a key value pair and store it into a hashmap to make comparisons later on. However, I do not want to have a hashmap with 2 million key value pairs in the interest of space complexity.

Apache Commons IO File Monitoring vs. JDK WatchService

I need to develop an application that will process csv files as soon as the files are created in a predefined directory. Huge number of incoming files is expected. I have seen applications using …