How to read only files with a certain format from folder with java

Question

I have this folder on the server and I only want to read files from this folder on the server... I only want to read files with the files format starting with error_ and ending with xml... an example of a file would be..
error_123.xml
I want something like this
if(fileName.startsWith("error_") && fileName.endsWith(".xml")){
but which java package will I have to use to read the file from the directory...

Answer 1

Create an implementation of the java.io.FilenameFilter interface to match the pattern you need.
Create a java.io.File object for the folder.
Use the File.listFiles(FilenameFilter) method to get an array of File objects for the files in the folder that match the pattern.
For each file in the array, create a FileInputStream, wrap it in an InputStreamReader, and wrap that in a BufferedReader (assuming you want to read the XML files as character streams).