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Java RandomAccessFile writeInt() Method with Example

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

RandomAccessFile Class writeInt() method

• writeInt() method is available in java.io package.
• writeInt() method is used to write an integer value to the file as 4 bytes directly without any conversion.
• writeInt() 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.
• writeInt() method may throw an exception at the time of writing integer value.
  IOException: This exception may throw an exception while performing input/output operation.

Syntax:

    public final void writeInt(int val);

Parameter(s):

• int val – represents an integer 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 writeInt(int val) method of
// RandomAccessFile

import java.io.*;

class RAFWriteInt {
 public static void main(String[] args) throws Exception {
  int in = 124587;
  // Instantiate a random access file
  // object with file name and permissions
  RandomAccessFile ra_f = new RandomAccessFile("e:/includehelp.txt", "rw");

  // By using writeInt() method is to 
  // write an integer value to the file

  ra_f.writeInt( in );

  // 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 readInt() method is to 
  // read a integer from this file
  System.out.print("ra_f.readInt(): " + ra_f.readInt());


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

Output

ra_f.readInt(): 124587