Read all standard input into a Java byte array

Question

What\'s the simplest way in modern Java (using only the standard libraries) to read all of standard input until EOF into a byte array, preferably without having to prov

Answer 1

If you're reading from a file, Files.readAllBytes is the way to do it.

Otherwise, I'd use a ByteBuffer:

ByteBuffer buf = ByteBuffer.allocate(1000000);
ReadableByteChannel channel = Channels.newChannel(System.in);
while (channel.read(buf) >= 0)
    ;
buf.flip();
byte[] bytes = Arrays.copyOf(buf.array(), buf.limit());