Reading directory using file api : how to handle a directory containing 20000-30000 files?
directory, file-io, iteration, java
Solution
You should use a java.nio.file.FileVisitor via java.nio.file.Files.walkFileTree(...). It has been introduced in Java 7 exactly for this use case.
Problem
I in the process of writting a simple java program which reads the contents of the directory and print out the names of the files and last modified time . The issue i forsee is , the vault i am reading is pretty huge and there are some case where the files in a single directory can well exceed 20000. Using file api ``` `file.listFiles()` ``` would inturn create 20000 file objects, my concern this could slow down the process , may be bloat the memory as well. Is there a way to batch i.e to tell java to scan the directory in terms of 50 files at a time or atleast iterate one file at a time instead of loading all objects in memory at once