import java.net.*;
import java.io.*;
public class Client1 {
public static void main(String[] args) throws Exception {
String hostAddr = "127.0.0.1"; // Loopback Address
int hostPort = 8000;
System.out.println("Client requesting for connection...");
Socket clientSideSocket = new Socket(hostAddr, hostPort);
System.out.println("Connection established.");
PrintWriter serverWriter = new PrintWriter(
clientSideSocket.getOutputStream(), true);
System.out.println("Key in a message for the server:");
serverWriter.println(new BufferedReader(
new InputStreamReader(System.in)).readLine());
System.out.println("Message sent to server.");
}
}
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import java.net.*;
import java.io.*;
public class Server1 {
public static void main(String[] args) throws Exception {
int port = 8000;
ServerSocket serverSocket = new ServerSocket(port);
System.out.println("Server Started. Waiting for connection...");
Socket serverSideClientSocket = serverSocket.accept();
System.out.println("Client connection request received.");
System.out.println("Sockets bound and ready for communication.");
BufferedReader clientReader = new BufferedReader(new InputStreamReader(
serverSideClientSocket.getInputStream()));
System.out.println("Waiting for message from client...");
String messageFromClient = clientReader.readLine();
System.out.println("Client says: " + messageFromClient);
}
}
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import java.net.*;
import java.io.*;
public class Client2 {
public static void main(String args[]) {
try {
Socket clientSideSocket = new Socket("localhost", 8000);
BufferedReader serverReader = new BufferedReader(
new InputStreamReader(clientSideSocket.getInputStream()));
PrintWriter serverWriter = new PrintWriter(
clientSideSocket.getOutputStream(), true);
BufferedReader keyboardReader = new BufferedReader(
new InputStreamReader(System.in));
double radius = 0;
while (true) {
System.out.print("Please enter the Radius of a Circle...");
radius = Double.parseDouble(keyboardReader.readLine());
serverWriter.println(radius);
if (radius != 0) {
double area = Double.parseDouble(
serverReader.readLine());
System.out.println("Area received from the Server: " +
area);
} else {
break;
}
}
} catch(IOException e) {
}
}
}
---------------------- ----------------------
import java.io.*;
import java.net.*;
public class Server2 {
public static void main(String[] args) {
try {
ServerSocket serverSocket = new ServerSocket(8000);
Socket serverSideClientSocket = serverSocket.accept();
BufferedReader clientReader = new BufferedReader(
new InputStreamReader(
serverSideClientSocket.getInputStream()));
PrintWriter clientWriter = new PrintWriter(
serverSideClientSocket.getOutputStream(), true);
while (true) {
double radius = Double.parseDouble(clientReader.readLine());
if (radius != 0) {
System.out.println("Radius Received from Client: " +
radius);
double area = radius * radius * Math.PI;
clientWriter.println(area);
} else {
break;
}
}
} catch(IOException e) {
//System.out.println(e);
}
}
}
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