Java - how to use RandomAccessFile class?

package com.dirask.examples;

​

import java.io.IOException;

import java.io.RandomAccessFile;

​

public class Program {

​

    public static void main( String[] args ) throws IOException {

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        RandomAccessFile file = new RandomAccessFile( "data.dat", "rw" );

​

        try {

            file.seek( 0 );

            file.writeByte( 10 );    // 1B - offset 0

            file.writeShort( 11 );   // 2B - offset 1

            file.writeInt( 12 );     // 4B - offset 3

            file.writeUTF( "Text" ); //      offset 7

​

            file.seek( 3 );

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            int number = file.readInt();

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            System.out.println( "Number: " + number );

        } finally {

            file.close();

        }

    }

}

Number: 12