Posts Tagged ‘Java’

Open up the two java programs given below (SimpleServer & SimpleClient) using your JAVA IDE (I prefer JCreator) separately. Buid it and run the SimpleServer 1st then run SimpleClient. Now start chating.

SimpleServer Source Code:

import java.net.*;
import java.io.*;
import java.util.*;
import java.text.DateFormat;
public class SimpleServer {
public static void main(String args[]) {
ServerSocket s = null;

//Input From Keyboard
String str;
DataInputStream indata= new  DataInputStream (System.in);
System.out.println(”Type in Something & Press Enter to Send it To The >>C L I E N T<<: “);
// Register your service on port 5432
try {
s = new ServerSocket(5432);
} catch (IOException e) {
// ignore
}
// Run the listen/accept loop forever
while (true) {
try {
// Wait here and listen for a connection
Socket s1 = s.accept();
// Get output stream associated with the socket
OutputStream s1out = s1.getOutputStream();
DataOutputStream dos = new DataOutputStream(s1out);

System.out.println();
System.out.println(”Write Something: “);
str=indata.readLine();
dos.writeUTF(str);

// Get an input stream from the socket
InputStream is = s1.getInputStream();

// Decorate it with a “data” input stream
DataInputStream dis = new DataInputStream(is);
// Read the input and print it to the screen
System.out.println(”Incoming From Client>>>:” +dis.readUTF());
//Display System Date
DateFormat defaultDate = DateFormat.getDateInstance();
System.out.println(defaultDate.format(new Date()));
//Display System Time
DateFormat shortTime = DateFormat.getTimeInstance(DateFormat.SHORT);
System.out.println(shortTime.format(new Date()));

// Close the connection, but not the server socket
dos.close();
s1.close();
dis.close();
} catch (IOException e) {
// ignore
}
}
}
}

SimpleClient Source Code

import java.net.*;
import java.io.*;
import java.util.*;
import java.text.DateFormat;
public class SimpleClient {
public static void main(String args[]) {

//Input From Keyboard
String str;
DataInputStream indata= new DataInputStream (System.in);

System.out.println(”Type in Something & Press Enter to Send it To The >>S E R V E R<<: “);

while(true){

try {

// Open your connection to a server, at port 5432

// localhost used here

Socket s1 = new Socket(”127.0.0.1″, 5432);

// Get an input stream from the socket

InputStream is = s1.getInputStream();

// Decorate it with a “data” input stream

DataInputStream dis = new DataInputStream(is);

// Read the input and print it to the screen

System.out.println(”Incoming From Server>>>:” +dis.readUTF());
//Display System Date
DateFormat defaultDate = DateFormat.getDateInstance();
System.out.println(defaultDate.format(new Date()));
//Display System Time
DateFormat shortTime = DateFormat.getTimeInstance(DateFormat.SHORT);
System.out.println(shortTime.format(new Date()));

// Get output stream associated with the socket
OutputStream s1out = s1.getOutputStream();
DataOutputStream dos = new DataOutputStream(s1out);
System.out.println();
System.out.println(”Write Something: “);
str = indata.readLine();
dos.writeUTF(str);

// When done, just close the steam and connection
dis.close();
dos.close();
s1.close();
} catch (ConnectException connExc) {
System.err.println(”Could not connect to the server.”);
} catch (IOException e) {
// ignore
}
}
}
}

Enjoy. Don’t forget to give me feedback. If you face any difficulties please let me know.