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Java RandomAccessFile writeUTF() Method with Example

RandomAccessFile Class writeUTF() method: Here, we are going to learn about the writeUTF() method of RandomAccessFile Class with its syntax and example.
Submitted by Preeti Jain, on March 23, 2020

RandomAccessFile Class writeUTF() method

• writeUTF() method is available in java.io package.
• writeUTF() method is used to write the given string value to the file with the help of updated encoding scheme UTF-8.
• writeUTF() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• writeUTF() method may throw an exception at the time of writing the string.
  IOException: This exception may throw an exception while performing input/output operation.

Syntax:

    public final void writeUTF(String s);

Parameter(s):

• String s – represents the string value to write.

Return value:

The return type of this method is void, it returns nothing.

Example:

// Java program to demonstrate the example 
// of void writeUTF(String s) method of
// RandomAccessFile

import java.io.*;

class RAFWriteUTF {
 public static void main(String[] args) throws Exception {
  String str = "Welcome, in Java World!!!";
  // Instantiate a random access file
  // object with file name and permissions
  RandomAccessFile ra_f = new RandomAccessFile("e:/includehelp.txt", "rw");

  // By using writeUTF() method is to 
  // write a string value to the file by using
  // UTF encoding scheme

  ra_f.writeUTF(str);

  // by using seek() method is to 
  // set the current file indicator
  // from where read/write could 
  // start i.e. we set here 0 so reading
  // will be done from 0 till EOF
  ra_f.seek(0);

  // By using readUTF() method is to 
  // read a string value from this file
  System.out.print("ra_f.readUTF(): " + ra_f.readUTF());

  // By using close() method isto
  // close this stream ran_f
  ra_f.close();
 }
}

Output

ra_f.readUTF(): Welcome, in Java World!!!