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Java Programming [ Lab Programs ]

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Aim:

Write a Java program on Random Access File class to perform different read and write operations.

Source Code:

RandomAccessFileExample.java

import java.io.*;

public class RandomAccessFileExample {

    public static void main(String[] args) {

        try {

            // Create a RandomAccessFile object with read-write mode

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

            // Write data to the file

            String data1 = "Hello";

            String data2 = "World";

            file.writeUTF(data1);

            file.writeUTF(data2);

            // Move the file pointer to the beginning of the file

            file.seek(0);

            // Read data from the file

            String readData1 = file.readUTF();

            String readData2 = file.readUTF();

            System.out.println("Data read from file:");

            System.out.println(readData1);

            System.out.println(readData2);

            // Move the file pointer to the ending of the file

            file.seek(file.length());

            // Append new data to the file

            String newData = "Java!";

            file.writeUTF(newData);

            // Move the file pointer to the beginning of the file

            file.seek(0);

            // Read data from the file again after appending

            readData1 = file.readUTF();

            readData2 = file.readUTF();

            String readData3 = file.readUTF();

            System.out.println("Data read from file after appending:");

            System.out.println(readData1);

            System.out.println(readData2);

            System.out.println(readData3);

            // Close the file

            file.close();

        } catch (IOException e) {

            System.out.println("An error occurred: " + e.getMessage());

            e.printStackTrace();

        }

    }

}

Output:

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4) Write a Java program on Random Access File class to perform different read and write operations. View Solution

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