Java Program to Convert contents of a file to byte array and Vice-Versa

The FileInputStream class contains a method read(), this method accepts a byte array as a parameter and it reads the data of the file input stream to given byte array. Assume the file myData contains the following data −

Example

import java.io.File; import java.io.FileInputStream; public class FileToByteArray {    public static void main(String args[]) throws Exception{       File file = new File("myData");       FileInputStream fis = new FileInputStream(file);       byte[] bytesArray = new byte[(int)file.length()];       fis.read(bytesArray);       String s = new String(bytesArray);       System.out.println(s);    } }

Output

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