PPT Slide

import java.net.*;

import java.io.*;

public class DayTimeClient {

public static final int iDAY_TIME_PORT = 13; // RFC 867

public static final int BUFF = 256;

public static void main (String arg[]) throws Exception {

if (arg.length == 0)

showUsage();

Socket sock = new Socket(arg[0], iDAY_TIME_PORT);

InputStream is = sock.getInputStream();

int i; byte[] b = new byte[BUFF];

while ( (i=is.read(b)) != -1)

System.out.println(new String(b, 0, i));

}

public static void showUsage(){

System.err.println

("Usage:\n\tjava DayTimeClient <IP Address>");

System.exit(0);

}//showUsage

}//class DayTimeClient