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Download E-books Java¿ Network Programming and Distributed Computing PDF

Posted On February 2, 2017 at 5:13 pm by / Comments Off on Download E-books Java¿ Network Programming and Distributed Computing PDF

By David Reilly

For all beginner-to-intermediate ordinary Java programmers, in addition to community programmers who have to learn how to paintings with Java, this booklet presents a entire consultant to Java networking and allotted part improvement.

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Out. println(line); go back line; } // Writes a line to the POP server, and screens it to the display safe void writeMsg(String msg) throws Exception { pw. println(msg); pw. flush(); method. out. println("> "+msg); } // shut all writers, streams and sockets secure void closeConnection() throws Exception { pw. flush(); pw. close(); br. close(); socket. close(); } // ship the give up command, and shut connection safe void sendQuit() throws Exception { procedure. out. println("Sending QUIT"); writeMsg("QUIT"); readLine(true); procedure. out. println("Closing Connection"); closeConnection(); } // exhibit emails in a message safe void displayEmails() throws Exception { BufferedReader userinput = new BufferedReader( new 168 InputStreamReader (System. in) ); method. out. println("Displaying mailbox with protocol instructions " and responses below"); method. out. println("----------------------------------+ "---------------------------"); // Open a connection to POP3 server process. out. println("Opening Socket"); socket = new Socket(this. hostname, this. port); br = new BufferedReader(new InputStreamReader(socket. getInputStream())); pw = new PrintWriter(new OutputStreamWriter(socket. getOutputStream())); // If reaction from server isn't ok if(! responseIsOk()) { socket. close(); throw new Exception("Invalid POP3 Server"); } // Login by means of sending consumer and cross instructions process. out. println("Sending username"); writeMsg("USER "+this. username); if(! responseIsOk()) { sendQuit(); throw new Exception("Invalid username"); } method. out. println("Sending password"); writeMsg("PASS "+this. password); if(! responseIsOk()) { sendQuit(); throw new Exception("Invalid password"); } // Get mail count number from server .... approach. out. println("Checking mail"); writeMsg("STAT" ); // ... and parse for variety of messages String line = readLine(true); StringTokenizer tokens = new StringTokenizer(line," "); tokens. nextToken(); int messages = Integer. parseInt(tokens. nextToken()); int maxsize = Integer. parseInt(tokens. nextToken()); if (messages == zero) { approach. out. println ("There are not any messages. "); sendQuit(); go back; } method. out. println ("There are " + messages + " method. out. println("Press input to proceed. "); userinput. readLine(); 169 messages. "); for(int i = 1; i <= messages ; i++) { method. out. println("Retrieving message quantity "+i); writeMsg("RETR "+i); approach. out. println("--------------------"); line = readLine(false); while(line ! = null && ! line. equals(". ")) { line = readLine(false); } approach. out. println("--------------------"); method. out. println("Press input to proceed. " + "To cease, style Q then enter"); String reaction = userinput. readLine(); if (response. toUpperCase(). startsWith("Q")) holiday; } sendQuit(); } public static void main(String[] args) throws Exception { Pop3ClientDemo customer = new Pop3ClientDemo(); } // learn consumer enter safe void getInput() throws Exception { String data=null; BufferedReader br = new BufferedReader (new InputStreamReader(System. in)); procedure. out. print("Please input POP3 server hostname:"); facts = br.

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