Java Socket Programming for Client-Server Communication

Java Socket Implementation

Client-Server Socket Class (`Misocket`)

Constructor for Server (`Misocket(int port)`):

• Initializes a `ServerSocket` with the specified port.
• Waits for and accepts a client connection using `serverSocket.accept()`.
• Obtains input and output streams from the accepted client socket.

Constructor for Client (`Misocket(String ip, int port)`):

• Creates a `Socket` to connect to the specified IP address and port.
• Obtains input and output streams for communication.

Core Functionality

Sending and Receiving Strings:

• `dos.writeUTF(cadena); dos.flush();` to send a string.
• `cadena = dis.readUTF(); return cadena;` to receive a string.

Sending and Receiving Integers:

• `dos.writeInt(tam);` to send an integer.
• `tam = dis.readInt(); return tam;` to receive an integer.

Array Handling:

• `public void enviar_array(Array array)`: Sends an array of bytes.
• `public Array recibir_array(int tam)`: Receives an array of bytes of a specified size.

Array Class (`Array`)

• Stores data in a `byte[]` array.
• Constructor: `public Array(int tam)` initializes the byte array with a given size.
• `public int tam_array()`: Returns the maximum size of the array.
• `public byte[] obtenerArray()`: Returns the underlying byte array.
• `actualizartam(int nuevoTam)`: Updates the array's effective size.
• `public byte obtenervalor(int pos)`: Retrieves a byte at a specific position.
• `public void insertarelemento(byte valor, int pos)`: Inserts a byte at a specific position.

File Handling (`Fichero`)

• Represents a file with a given name.
• `public Array volcar_fich_array(int tam)`: Reads data from a file into an `Array` object.
• `public void volcar_array_fichero(Array array)`: Writes data from an `Array` object to a file.

Stream Management

• Methods for opening and closing input/output streams (e.g., `abrestreams_l`, `cerrrar_streams`, `abrir strams`, `cerrarstreams_e`).
• Includes `FileInputStream`, `BufferedInputStream`, `DataInputStream`, `FileOutputStream`, `BufferedOutputStream`, and `DataOutputStream`.

Closing Connections

• `if(dis!=null) dis.close();`: Closes input streams.
• Similar logic applies to other streams (`bis`, `fis`, `fos`, `bos`, `dos`).

Example Usage (`main`)

• Client: `Misocket sock = new Misocket("localhost", 5000);`
• Server: `Misocket sock = new Misocket(5000);`