Java Basic IO - Byte Stream

import java.io.ByteArrayInputStream;

public class ByteStream {
    public static void main(String[] args) {

        // Contoh input dari String
        String teks = "ABC";

        // Buat input stream
        ByteArrayInputStream input = new ByteArrayInputStream(teks.getBytes());

        // Salin input stream ke variabel
        int first = input.read();

        // Variabel siap digunakan
        System.out.println("first = " + first);

    }
}