Check if a directory exists in Java

This post will discuss how to check if a directory exists in Java.

There are several ways to check for the directory’s existence in Java. Each of the following solutions returns true if the directory exists; false otherwise.

1. Using `File.isDirectory()` method

The idea is to use the File.isDirectory() method to determine whether the file denoted by a specified path is a directory. This method returns true if the directory exists; false otherwise. This is demonstrated below:

import java.io.File;

class Main

{

public static void main(String[] args)

{

String directoryPath = "/var/www/html/";

File file = new File(directoryPath);

if (file.isDirectory()) {

System.out.println("File is a Directory");

}

else {

System.out.println("Directory doesn't exist!!");

}

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2. Using `NIO`

From Java 7 onward, we can use java.nio.file.Files, which provides several static methods that operate on files, directories, or other types of files. To simply check for a directory’s existence, we can use isDirectory() method of java.nio.file.Files class. The Files.isDirectory() returns true when your path points to a directory. This is demonstrated below:

import java.nio.file.Files;

import java.nio.file.Path;

import java.nio.file.Paths;

class Main

{

public static void main(String[] args)

{

String directoryPath = "/var/www/html/";

Path path = Paths.get(directoryPath);

boolean isDir = Files.isDirectory(path);

if (isDir) {

System.out.println("File is a Directory");

}

else {

System.out.println("Directory doesn't exist!!");

}

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That’s all about determining whether a directory exists in Java.

Check if a directory exists in Java

1. Using File.isDirectory() method

2. Using NIO

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1. Using `File.isDirectory()` method

2. Using `NIO`