How to convert File to Byte in Java

Question

I am working on a file. But I want to convert it into bytes. How can I do this?

Answer 1

You can use IOUtils.toByteArray(InputStream input).

Answer 2

import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.Path;

Path path = Paths.get("path of file");
byte[] data = Files.readAllBytes(path);

Answer 3

import java.io.File;
import java.nio.file.Files;

File file;
// ...(file is initialised)...
byte[] fileContent = Files.readAllBytes(file.toPath());