operating-system-second-assignment/Problem 3.18/SocketClient.java

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

public class SocketClient {
    public static void main(String[] args) {
        Socket sock = null;
        Scanner scanner = null;
        try {
            sock = new Socket("127.0.0.1", 6017);
            scanner = new Scanner(System.in);
            DataOutputStream outputStream = new DataOutputStream(sock.getOutputStream());
            DataInputStream inputStream = new DataInputStream(sock.getInputStream());
            while (true) {
                try {
                    System.out.print("Input: ");
                    String message = scanner.nextLine();
                    outputStream.writeUTF(message);
                    System.out.println("Echo: " + inputStream.readUTF());
                } catch (IOException e) {
                    System.err.println(e);
                }
            }
        }
        catch (IOException ioe) {
            System.err.println(ioe);
        }
        finally {
            try {
                scanner.close();
                sock.close();
            } catch (IOException e) {}
        }
    }
}