How to retrieve all the files from Directory using Java

String[] java.io.File.list()

Returns an array of strings naming the files and directories in the directory denoted by this abstract pathname.

If this abstract pathname does not denote a directory, then this method returns null. Otherwise an array of strings is returned, one for each file or directory in the directory. Names denoting the directory itself and the directory's parent directory are not included in the result. Each string is a file name rather than a complete path.

There is no guarantee that the name strings in the resulting array will appear in any specific order; they are not, in particular, guaranteed to appear in alphabetical order.

Note that the java.nio.file.Files class defines the newDirectoryStream method to open a directory and iterate over the names of the files in the directory. This may use less resources when working with very large directories, and may be more responsive when working with remote directories.

Returns:
An array of strings naming the files and directories in the directory denoted by this abstract pathname. The array will be empty if the directory is empty. Returns null if this abstract pathname does not denote a directory, or if an I/O error occurs.
Throws:
SecurityException - If a security manager exists and its SecurityManager.checkRead(String) method denies read access to the directory

ShowFiles.java

package com.javatutorialcorner.regex;

import java.io.File;

public class ShowFiles {

 private static final String DIRECOTORY_PATH = "C:\\JTC\\Java\\Examples\\Directory\\File";

 public static void main(String args[]) {
  retrieveFiles();
 }

 private static void retrieveFiles() {
  File directory = new File(DIRECOTORY_PATH);
  String[] files = directory.list();

  if (files == null) {
   System.out.println("Directory does not exist");
  } else {
   for (int i = 0; i < files.length; i++) {
    String filename = files[i];
    System.out.println(filename);
   }
  }

 }
}

Output