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How to write contents of a file to byte array in Java?
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.
Example
import java.io.File; import java.io.FileInputStream; public class FileToByteArray { public static void main(String args[]) throws Exception { File file = new File("HelloWorld"); 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
//Class declaration public class SampleProgram { /* This is my first java program. This will print 'Hello World' as the output */ //Main method public static void main(String []args) { //prints Hello World System.out.println("Hello World"); } }
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