Using DirectoryStream in Java

How to quickly use DirectoryStream in Java

This Java programming tutorial will show developers how to quickly use the DirectoryStream interface to obtain a list of file names of a given type (or types) specified during the newDirectoryStream.

DirectoryStream examples in Java

Below is a code example showing how to use the DirectoryStream interface to gather a list of file name of a certain type in Java:

*/

import java.io.*;
import java.util.*;
import java.nio.file.*;

public class UsingDirectoryStream
{
	public static void main(String args[])
	{
		UsingDirectoryStream usingDirectoryStream = new UsingDirectoryStream();
		usingDirectoryStream.proceed();
	}
	
	private void proceed()
	{
		String fileTypes = "*.{java}";
		Path currDir = Paths.get(".");
		List pathResult = new ArrayList<>();

		try (DirectoryStream directoryStream = Files.newDirectoryStream(currDir, fileTypes)) {
			for (Path filePath: directoryStream) {
				pathResult.add(filePath);
				System.out.println("Found: " + filePath);
			}
		}catch(DirectoryIteratorException directoryIteratorException) 
		{
			System.out.println("DirectoryIteratorException: " + directoryIteratorException);
		}catch(IOException ioException) 
		{
			System.out.println("IOException: " + ioException);
		}
	}
}

/*

Running this Java code snippet in your integrated development environment (IDE) or code editor would produce the following expected output:

[root@mypc]# java UsingDirectoryStream
Found: .\ArrayListVsHashMap.java
Found: .\CombiningExceptions.java
Found: .\ConvertingToMicroseconds.java
Found: .\ConvertToOctal.java
Found: .\UsingDirectoryStream.java

Read: Top Java IDEs