How to create new file inside directory in Java?



Problem Description :


Write a program in Java that creates a new file inside a given directory.

Java program that creates a new file in given directory.
Create new file in given directory in Java


Concept
:


We can solve this problem with the help of mkdir() and createNewFile() methods of File class that is present in java.io package. We will use following two constructors of File class to create file class instance.
                                             File file=new File(directorypath);
            File file=new File(directoryname,filename);


Algorithm :


  1. Validate drive letter and file name. Drive letter should be character and file name should have proper extension, for example - .txt, .pdf, .doc etc.
  2. Check whether given directory already exists in given drive or not? 
  3. If directory exists then no need to create new directory otherwise create directory.
  4. Check whether given file exists in given directory or not?
  5. If file exists then no need to create new file otherwise create file.

Java Program :



Output :


Output of Java program that creates a new file in given directory.
Output - How to create a new file in given directory in Java?

After the execution of above program
given file is present in given directory.
file "demo.txt" in directoy "E:\javamultiplex"

References :


https://docs.oracle.com/javase/7/docs/api/java/io/File.html#exists()

https://docs.oracle.com/javase/7/docs/api/java/io/File.html#mkdir()


https://docs.oracle.com/javase/7/docs/api/java/io/File.html#createNewFile()

https://docs.oracle.com/javase/7/docs/api/java/lang/String.html


https://en.wikipedia.org/wiki/Regular_expression


Thank you friends, I hope you have clearly understood the solution of this problem. If you have any doubt, suggestion or query please feel free to comment below. You can also discuss this solution in our forum.

Tags : File Handling, Create new file in directory, if else, Scanner, BufferedReader, File, String, Regular Expressions, InputStreamReader, java.io, mkdir(), exists(), createNewFile().

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How to create new file inside directory in Java? How to create new file inside directory in Java? Reviewed by Unknown on 3/30/2017 Rating: 5

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