Education and Career Forum

A file is having some data. We can transfer that data to another file using some streams LikeDataInputStream,OutputStreams

While doing this I would like to store that data in a string array and then do the transefer.

You can easily read the contents of a file into a string using the FileReader and BufferedReader classes in Java. Here's an example code snippet that demonstrates how to do it:

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class FileToStringExample {
    public static void main(String[] args) {
        try {
            BufferedReader reader = new BufferedReader(new FileReader("input.txt"));
            StringBuilder stringBuilder = new StringBuilder();
            String line = null;
            while ((line = reader.readLine()) != null) {
                stringBuilder.append(line);
                stringBuilder.append(System.lineSeparator());
            }
            reader.close();
            String fileContents = stringBuilder.toString();
            System.out.println(fileContents);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

In this example, we first create a BufferedReader object and wrap it around a FileReader object that reads the contents of the file "input.txt". We then use a StringBuilder object to accumulate the contents of the file into a single string. Finally, we close the BufferedReader object and print the file contents to the console.

Note that we use the System.lineSeparator() method to add the line separator character to the string after each line. This is necessary because the readLine() method of the BufferedReader class does not include the line separator character in the returned string.

~Best Regards
Suraj Pratap Singh
M.Tech (CSE, final)