how to list all files inside a folder using java

In this post, we will how to list all files inside a folder using java. Here we will use File.java for these operations

In below example we are going to use .list method to list all files and directories without trans versing into sub directories.

The file path I am going to use is F:\Java which having file like below image 

Example

import java.io.File;

public class ListAllFilesExample {

	public static void main(String[] args) {
		try {

			File file = new File("F:\\Java");
			String[] list = file.list();
			for (String fileName : list) {
				System.out.println(fileName);
			}

		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}

Output

access.txt
apache-tomcat-8.5.35
eclipse
Maven
sample.txt
sts-bundle

Transverse into sub folders using Java 8

Using java8 we can easily transverse into all sub folders in side the folder. In below Example we are using Files.walk to get all the files and folders by trans versing inside the folders

import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.stream.Stream;

public class ListAllFilesUsingJava8 {

	public static void main(String[] args) {
		try {
			Path path = Paths.get("F:/Java");
			Stream<Path> walk = Files.walk(path);
			walk.forEach(x -> System.out.println(x.getFileName()));

		} catch (Exception e) {
			e.printStackTrace();
		}

	}

}

Output

org.eclipse.datatools.enablement.hsqldb.ui_1.2.1.201712071719.jar
org.eclipse.datatools.enablement.hsqldb_1.2.1.201712071719.jar
org.eclipse.datatools.enablement.ibm.db2.iseries.dbdefinition_1.2.1.201712071719.jar

Github

https://github.com/rkumar9090/BeginnersBug/blob/master/BegineersBug/src/com/geeks/example/files/ListAllFilesExample.java

https://github.com/rkumar9090/BeginnersBug/blob/master/BegineersBug/src/com/geeks/example/files/ListAllFilesUsingJava8.java

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