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Java RandomAccessFile writeChars() Method with Example

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

RandomAccessFile Class writeChars() method

• writeChars() method is available in java.io package.
• writeChars() method is used to write the string (i.e. the sequence of characters) to the file with the help of the writeChar() method write every character to the data output stream.
• writeChars() 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.
• writeChars() method may throw an exception at the time of writing characters.
  IOException: This exception may throw an exception while performing input/output operation.

Syntax:

    public final void writeChars(String str);

Parameter(s):

• String str – 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 writeChars(String str) method of
// RandomAccessFile

import java.io.*;

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

  // By using writeChars() method is to 
  // write string to the file
  // at a time 
  ra_f.writeChars("Welcome, in Java Programming!!!");

  // 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 readChar() method is to 
  // read a string from this file with the
  // help of loop
  for (int i = 0; i < 31; ++i)
   System.out.print(" " + ra_f.readChar());

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

Output

 W e l c o m e ,   i n   J a v a   P r o g r a m m i n g ! ! !