Reading a binary input stream into a single byte array in Java

Question

The documentation says that one should not use available() method to determine the size of an InputStream. How can I read the whole content of an <

Answer 1

You can use Apache commons-io for this task:

Refer to this method:

public static byte[] readFileToByteArray(File file) throws IOException

Update:

Java 7 way:

byte[] bytes = Files.readAllBytes(Paths.get(filename));

and if it is a text file and you want to convert it to String (change encoding as needed):

StandardCharsets.UTF_8.decode(ByteBuffer.wrap(bytes)).toString()