Spørgsmål angående try/finally

Hej. Jeg har fået denne kodestump, som laver en simpel server i Java. Mit spørgsmål er ganske enkelt: Hvorfor er der to sæt try/finally? Hvorfor ikke bare putte det hele ind i én try/finally?


//: c15:JabberServer.java
// Very simple server that just
// echoes whatever the client sends.
// {RunByHand}

import java.io.*;
import java.net.*;

public class JabberServer { 
  // Choose a port outside of the range 1-1024:
  public static final int PORT = 8080;
  public static void main(String[] args)
      throws IOException {
    ServerSocket s = new ServerSocket(PORT);
    System.out.println("Started: " + s);
    try {
      // Blocks until a connection occurs:
      Socket socket = s.accept();
      try {
        System.out.println(
          "Connection accepted: "+ socket);
        BufferedReader in =
          new BufferedReader(
            new InputStreamReader(
              socket.getInputStream()));
        // Output is automatically flushed
        // by PrintWriter:
        PrintWriter out =
          new PrintWriter(
            new BufferedWriter(
              new OutputStreamWriter(
                socket.getOutputStream())),true);
        while (true) { 
          String str = in.readLine();
          if (str.equals("END")) break;
          System.out.println("Echoing: " + str);
          out.println(str);
        }
      // Always close the two sockets...
      } finally {
        System.out.println("closing...");
        socket.close();
      }
    } finally {
      s.close();
    }
  }
} ///:~