package threadbook.ch15;

import java.io.*;

import java.net.*;

public class CalcClient extends Object {

public static void main(String[] args) {

String hostname = "localhost";

int port = 2001;

try {

Socket sock = new Socket(hostname, port);

DataInputStream in = new DataInputStream(

new BufferedInputStream(sock.getInputStream()));

DataOutputStream out = new DataOutputStream(

new BufferedOutputStream(sock.getOutputStream()));

double val = 4.0;

out.writeDouble(val);

out.flush();

double sqrt = in.readDouble();

System.out.println("sent up " + val + ", got back " + sqrt);

// Don't ever send another request, but stay alive in

// this eternally blocked state.

Object lock = new Object();

while ( true ) {

synchronized ( lock ) {

lock.wait();

}

}

} catch ( Exception x ) {

x.printStackTrace();

}

}

}