File mkdir() method in Java with examples

28 Jan, 2019
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
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