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File mkdir() method in Java with examples

  • Last Updated : 28 Jan, 2019
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The mkdir() method is a part of File class. The mkdir() function is used to create a new directory denoted by the abstract pathname. The function returns true if directory is created else returns false.

Function Signature:

public boolean mkdir()

Syntax:

file.mkdir()

Parameters: This method do not accepts any parameter.

Return Value: The function returns boolean data type. The function returns true if directory is created else returns false.



Exception: This method throws SecurityException if the method does not allow directory to be created

Below programs will illustrate the use of mkdirs() function:

Example 1: Try to create a new directory named program in “f:” drive.




// Java program to demonstrate
// the use of File.mkdirs() method
  
import java.io.*;
  
public class GFG {
  
    public static void main(String args[])
    {
        // create an abstract pathname (File object)
        File f = new File("F:\\program");
  
        // check if the directory can be created
        // using the abstract path name
        if (f.mkdir()) {
  
            // display that the directory is created
            // as the function returned true
            System.out.println("Directory is created");
        }
        else {
            // display that the directory cannot be created
            // as the function returned false
            System.out.println("Directory cannot be created");
        }
    }
}

Output:

Directory is created

Example 2: Try to create a new directory named program1 in “f:\program” directory, but program directory is not created .we will test whether the function mkdir() can create the parent directories of the abstract path name if the directories are not present.




// Java program to demonstrate
// the use of File.mkdir() method
  
import java.io.*;
  
public class GFG {
  
    public static void main(String args[])
    {
  
        // create an abstract pathname (File object)
        File f = new File("F:\\program\\program1");
  
        // check if the directory can be created
        // using the abstract path name
        if (f.mkdir()) {
  
            // display that the directory is created
            // as the function returned true
            System.out.println("Directory is created");
        }
        else {
            // display that the directory cannot be created
            // as the function returned false
            System.out.println("Directory cannot be created");
        }
    }
}

Output:

Directory cannot be created

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




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