Java tutorial
import java.io.PipedInputStream; import java.io.PipedOutputStream; public class Main extends PipedInputStream { public static void main(String[] args) throws Exception { PipedOutputStream out = new PipedOutputStream(); Main in = new Main(); out.connect(in); out.write(70); out.write(71); out.write(72); out.flush(); for (int i = 0; i < 3; i++) { System.out.println((char) in.read()); } out.close(); } }