File isDirectory() method in Java with Examples

The isDirectory() function is a part of File class in Java . This function determines whether the is a file or directory denoted by the abstract filename is Directory or not.The function returns true if the abstract file path is Directory else returns false.

Function signature:

public boolean isDirectory()

Syntax:

file.isDirectory()

Parameters: This method does not accept any parameter.

Return Value: The function returns boolean value representing whether the abstract file path is a directory or not

Exception: This method throws Security Exception if the read access to the file is denied

Below programs illustrates the use of isDirectory() function:

Example 1: The file “F:\\program.txt” is a existing file in F: directory .

// Java program to demonstrate
// isDirectory() method of File Class

import java.io.*;

public class solution {
    public static void main(String args[])
    {

        // Get the file
        File f = new File("F:\\program");

        // Check if the specified path
        // is a directory or not
        if (f.isDirectory())
            System.out.println("Directory");
        else
            System.out.println("is not Directory");
    }
}

Output:

Directory

Example 2: The file “F:\\program1” is a non existing directory in F: directory .

// Java program to demonstrate
// isDirectory() method of File Class

import java.io.*;

public class solution {
    public static void main(String args[])
    {

        // Get the file
        File f = new File("F:\\program1");

        // Check if the specified path
        // is a directory or not
        if (f.isDirectory())
            System.out.println("Directory");
        else
            System.out.println("Not a Directory");
    }
}

Output:

Not a Directory

Note: The programs might not run in an online IDE. Please use an offline IDE and set the path of the file.