Q3Test.java

import java.io.*;
import java.net.*;
import java.util.Scanner;

public class Q3Test {
    public static void main(String[] argv) throws IOException {
        Scanner scanner = new Scanner(System.in);

        System.out.println("Connecting ...");
        Socket socket = new Socket("localhost", 12345);
        DataInputStream in = new DataInputStream(socket.getInputStream());
        DataOutputStream out = new DataOutputStream(socket.getOutputStream());
        System.out.println("Connected");

        String action;
        while (true) {
            System.out.print("Action: ");
            action = scanner.next();
            if (action.equals("readInt")) {
                System.out.println(in.readInt());
            } else if (action.equals("readUTF")) {
                System.out.println(in.readUTF());
            } else if (action.equals("writeInt")) {
                out.writeInt(scanner.nextInt());
            } else if (action.equals("exit")) {
                in.close();
                out.close();
                System.exit(0);
            }
        }


    }
}

import java.io.*;
import java.net.*;
import java.util.Scanner;

public class Q3bClient {
    public static void main(String[] argv) throws IOException {
        Scanner scanner = new Scanner(System.in);

        System.out.println("Connecting ...");
        Socket socket = new Socket("localhost", 12345);
        DataInputStream in = new DataInputStream(socket.getInputStream());
        DataOutputStream out = new DataOutputStream(socket.getOutputStream());
        System.out.println("Connected");


        String action = scanner.next();
        if (action.equals("get")) {
            out.writeInt(0);
            System.out.println(in.readUTF());
        } else if (action.equals("put")) {
            int input = scanner.nextInt();
            out.writeInt(1);
            out.writeInt(input);
            System.out.println(in.readUTF());
        }
    }
}