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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");
}
}
Updated on: 19-Dec-2019
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