Random Access File in Advanced Java Programming

import java.io.IOException;  

import java.io.RandomAccessFile;  

  

public class RandomAccessFileExample {  

    static final String FILEPATH ="test.TXT";  

    public static void main(String[] args) {  

        try {  

            System.out.println(new String(readFromFile(FILEPATH, 0, 18)));  

            writeToFile(FILEPATH, "Advanced Java", 31);  

        } catch (IOException e) {  

            e.printStackTrace();  

        }  

    }  

    private static byte[] readFromFile(String filePath, int position, int size)  

            throws IOException {  

        RandomAccessFile file = new RandomAccessFile(filePath, "r");  

        file.seek(position);  

        byte[] bytes = new byte[size];  

        file.read(bytes);  

        file.close();  

        return bytes;  

    }  

    private static void writeToFile(String filePath, String data, int position)  

            throws IOException {  

        RandomAccessFile file = new RandomAccessFile(filePath, "rw");  

        file.seek(position);  

        file.write(data.getBytes());  

        file.close();  

    }  

}