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+<code java>
+package nfs;
+import java.io.BufferedReader;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.PrintStream;
+import java.net.DatagramPacket;
+public class RemotePacket {
+	public final static int MAXPACKET = 1024;
+	String op = null;
+	String [] args = null;
+	DatagramPacket dp = null;
+	public static DatagramPacket RemotePacket(String op, String ... params) {
+		/* creates a datagram packet given a number of parameters
+		 */
+		ByteArrayOutputStream baos = new ByteArrayOutputStream();
+		PrintStream ps = new PrintStream(baos);
+		// print the operation type
+		ps.println(op);
+		// print the lenght of byte involved
+		ps.println(params.length);
+		// print the parameters
+		for(int i=0; i<params.length; i++)
+			ps.println(params[i]);
+		ps.println("ENDPACKET");
+		ps.flush();
+		byte [] buffer = baos.toByteArray();
+		DatagramPacket dp1 = new DatagramPacket(buffer, 0, buffer.length);
+		return dp1;
+	}
+	public RemotePacket(DatagramPacket dp) {
+		/* building of a remote packet from a datagram packet by separating
+		 * - the operation requested (READ, WRITE, OPEN, CLOSE)
+		 * - the arguments related to the operation (filenames, handlers, etc.)
+		 * */
+		try {
+			this.dp = dp;
+			byte [] buffer = dp.getData();
+			ByteArrayInputStream bais = new ByteArrayInputStream(buffer);
+			BufferedReader br = new BufferedReader(new InputStreamReader(bais));
+			/*arguments of the command line are separated by \n*/
+			this.op = br.readLine();
+			int numargs = Integer.parseInt(br.readLine());
+			if(numargs>0) {
+				this.args = new String[numargs];
+				for(int i=0; i<numargs; i++) {
+					this.args[i] = br.readLine();
+				}
+			}
+		} catch(IOException e) {
+			e.printStackTrace();
+		}
+		return;
+	}
+	public String getOp() {
+		return op;
+	}
+	public String [] getArgs() {
+		return args;
+	}
+	public String toString() {
+		String s = op+"::";
+		for(int i=0;i<args.length;i++)
+			s = s+" "+args[i];
+		return s;
+	}
+}
+</code>