File createNewFile() method in Java with Examples

The createNewFile() function is a part of File class in Java . This function creates new empty file. The function returns true if the abstract file path does not exist and a new file is created. It returns false if the filename already exists.

Function signature:

public boolean createNewFile()

Syntax:



boolean var = file.createNewFile();

Parameters: This method does not accept any parameter.

Return Type: The function returns boolean data type representing whether the new file is created or not.

Exception: This method throws following exceptions:

  • IO Exception: if input output error occurs
  • Security Exception: if the write access to the file is denied

Below programs illustrates the use of createNewFile() function:

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

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// Java program to demonstrate
// createNewFile() method of File Class
  
import java.io.*;
  
public class solution {
    public static void main(String args[])
    {
  
        try {
  
            // Get the file
            File f = new File("F:\\program.txt");
  
            // Create new file
            // if it does not exist
            if (f.createNewFile())
                System.out.println("File created");
            else
                System.out.println("File already exists");
        }
        catch (Exception e) {
            System.err.println(e);
        }
    }
}

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Output:

File created

Example 2: The file “F:\\program1.txt” does not exist

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// Java program to demonstrate
// createNewFile() method of File Class
  
import java.io.*;
  
public class solution {
    public static void main(String args[])
    {
  
        try {
  
            // Get the file
            File f = new File("F:\\program1.txt");
  
            // Create new file
            // if it does not exist
            if (f.createNewFile())
                System.out.println("File created");
            else
                System.out.println("File already exists");
        }
        catch (Exception e) {
            System.err.println(e);
        }
    }
}

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Output:

File already exists

Note: 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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Second year Department of Information Technology Jadavpur University

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