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Java Network Programming - TCP/IP Socket Programming

Name: Java Network Programming - TCP/IP Socket Programming
Rating: 4.7 (788 reviews)

Learn how to write powerful network applications.

Created byCatalin Baba

Last updated 12/2016

English

What you'll learn

Understand core concepts of network communication
Become familiar with basics of networking: internet architecture, IP addresses, TCP connections, ports.
Learn how to create java threads and how to use java IO
Learn the basics of Java sockets programming: creation and usage of sockets;
Know how to develop Client/Server TCP and UDP applications
Learn how to transfer data between server/client applications running on different machines on the network.
Code applications like: Port Scanner, Browse the Internet, Web Scraping, Get network interface properties, Validate IP Addresses, Ping a remote host
Develop more complex network applications: File Transfer Application, Small Web Server, Send Emails

Course content

9 sections • 50 lectures • 3h 37m total length

Introduction4:56
Networking Fundamentals2:30
TCP/IP Model5:18
Explore the TCP/IP protocol suite and its four-layer model, and how data is encapsulated and routed with ports, IP addresses, and headers.
TCP/IP Communication3:35
Compare TCP and UDP transport protocols used by IP, balancing reliability and overhead, while TCP ensures reliability via segmentation, acknowledgments, and retransmission, and UDP offers best-effort delivery.
Internet Protocol (IP)1:31
Loopback Interface0:39
Explore the loopback interface, a special virtual network interface used to communicate with the local machine for diagnosis and troubleshooting, with 127.0.0.1 mapping to localhost.

Thread Intro2:30
Networking and Threads0:57
Implementing Threads in Java3:01
Create the first thread8:24
Create the first thread by extending the thread class, start a new thread, and override run to print server messages from client 1 to 99, with named threads for tracking.
Run Multiple Threads Concurrently5:09
Create and run a second server thread to observe concurrency. The JVM's thread scheduler assigns CPU time in quanta, and priorities set via setPriority influence execution, yet ordering remains non-deterministic.
Sleep a Thread5:14
Learn how to pause a Java thread with the static sleep method, handle interruption, and manage timing to balance CPU usage across lightweight and CPU-intensive threads.
Runnable7:41
Threads Quiz

Java I/O Intro4:04
FileInputStream5:14
FileOutputStream5:03
Write data to a file with FileOutputStream, using constructors with a path and append mode, then write bytes or strings via getBytes, handle exceptions with try-catch, and close the stream.
DataStream9:29
Character Streams part I6:10
Use input stream reader and output stream writer to convert byte streams to character streams for multilingual text and network communications, explaining ASCII and Unicode character sets.
Character Streams part II1:40
We examine the default charset (UTF-8) using getEncoding and note that the JVM adopts the system setting. We show how OutputStreamWriter with ASCII fails to represent Japanese, yielding question marks.
Character Streams part III1:37
Explore writing to and reading from a text file with InputStreamReader, including flushing and closing, and iterating over characters until end-of-file to display the text.
BufferedStream7:53
Learn how Java buffered streams improve text transfer efficiency by wrapping unbuffered streams with buffered reader and writer, using readLine and write, and tuning buffer sizes.
PrintStream1:57
System.in3:35
Streams Quiz

Java Socket Programming Intro3:29
Local Port Scanner4:07
Instantiate a ServerSocket on port 9090, handle IOException with try-catch, and report when a port is open. Show port scanning concepts with netstat -a to reveal open ports locally quickly.
TCP Server5:50
Learn how a TCP server accepts client connections with accept(), uses the socket's input and output streams to exchange messages, and test with Telnet or a browser.
Multi-user Server3:22
Learn how a Java TCP server accepts multiple clients by using a loop and a stop flag, handles IO exceptions with try-catch, and closes streams and sockets after each client.
Multithreaded Server6:40
InetAddress class3:08
Explore the InetAddress class, Java's encapsulation of an IP address, and how to resolve hostnames using getLocalHost and getByName, then obtain IP addresses and hostnames with getHostAddress and getHostName.
TCP Client5:18
Create a Java socket client that connects to a server at localhost port 9090, uses InetAddress, and exchanges hello messages via input and output streams before closing resources.
Remote Port Scanner4:41
Learn how to build a remote port scanner using the Socket class to test a range of tcp ports on a target host, with user input validation and permission cautions.
Ping4:12
Learn how to ping a host in Java to check if a server is up before connecting, using the net address reachable method and the process class for cross-platform ping.
Validate IP addresses3:15
NetworkInterface class9:13
URL and Web Scraping6:00
Learn how to use URL and URLConnection in Java to read web data, perform web scraping, and extract the Oracle stock price from HTML with regex.
Java Sockets Quiz

SMTP Protocol4:18
Learn how to send an SMTP email with Java sockets and understand SMTP basics, including DNS resolution, MTA routing, and commands like HELO, MAIL FROM, RCPT TO, and DATA.
Application3:52
Build a Java smtp socket client that connects to a smtp server on port 25, exchanges smtp commands, and verifies responses with codes such as 220, 250, 354, and 221.
Install a SMTP server0:54
Run the Application1:45
Send emails using a Java program with a local SMTP server and a Gmail account, and verify delivery by checking the inbox for a test email.

Requirements

A computer - Windows, Mac or Linux
Java Development Kit 7 or Java Development Kit 8
Netbeans, Eclipse or any other IDE
Basic Java knowledge
Basic computer and Internet skills

Description

Update April 17, 2017: Two students asked me for subtitles. I removed the auto-generated subtitles and I added right subtitles for every lesson. Also, sound quality has been improved for some lessons. Thanks for your suggestion! Now, every student can follow this course more easily.

Update September 17, 2016: Some of my students asked me for a chat application. So
I created the application (GUI included) and I added it in chapter 9.
Now, you can download the application, run it and view the source code. Enjoy!

Update August 4, 2016: Added: quizzes for learning reinforcement.

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Student Testimonials!

★★★★★

The best course ever on udemy , it teaches student not only the how to build network application but also discuss all programming topics like streams , thread that involved on building network applications ,the teacher explains while he is coding every step in details , and explain why he prefered this method over that method . Mr. Catalin provides detail answers for any question in quick time . Take this course and you will master building network applications

Rashed

★★★★★

Professional and up to the point. It tells the beginners every single step about Java Network Programming which is very nice. It makes the difficult things look easy.

Sobhan N.

★★★★★

Excelente curso, esta muy bien explicado y la sintaxys del codigo es muy clara, solo me gustaria ver streaming de audio en tiempo real.

Juan

Course Description

With over 45 videos this online Java training course is designed to provide a solid foundation in Java network programming and network communication.

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Learn something new

Network programming is one field which everybody uses but is still considered an advanced topic.

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Open Source Code

All source code shown in this course is also available for download. Students can create their own projects using the downloaded java files.

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Combine theory with practice!

Each chapter has an intro video to cover basic theory needed to understand the rest of the material covered.

In the first chapter you will learn the concept of network communication from the very basic fundamental level that needs to be understood by everyone.

Two other chapters are included in this course for those programmer who haven’t worked yet with java threads or java IO. These two are very important topics when you want to build a network application and I want to ensure that all students have the basics before we start to code Client – Server applications.

In the Socket (Java Socket programming) section you will start to write simple TCP servers or TCP clients. Also, you will learn how to create a multi-user or a multithreaded server and we are going to test each written application. We will connect multiple TCP clients to a multithreaded server and we will observe the TCP server behavior and how it makes to respond to multiple clients at the same time.

In this chapter I will cover some other important network programming topics:

Scan a remote host for open ports
Get network interface hardware information
Validate an IP address in different ways
Ping a remote host address using java code
Browse internet using java code.
Web scrapping – get what data you want from a web page

UDP chapter focus on the difference between the most used Transport Layer protocols: TCP and UDP. We will write together an UDP server and an UDP client. The interesting part of this chapter comes after we will run the code. The next chapters present some useful applications:

Send an email
Transfer files between a server and a client using TCP sockets
A small web browser.

The code is explained in details, line by line. All the needed theory is presented in the application intro and we will test each application after the source code is explained.

So let’s start the interesting journey now!

Cheers,

Catalin Baba

Who this course is for:

The course is aimed for anyone who wants to learn network programming
If you have never written code, this course is probably not for you.

Java Network Programming - TCP/IP Socket Programming

What you'll learn

Explore related topics

Course content

Introduction To Networking6 lectures • 18min

Java Threads7 lectures • 33min

I/O Streams10 lectures • 47min

Java Sockets12 lectures • 59min

Java UDP programming4 lectures • 21min

Send Emails using SMTP protocol4 lectures • 11min

File Transfer Application4 lectures • 15min

Basic Web Server Application2 lectures • 12min

GUI Chat Application1 lecture • 2min

Requirements

Description

Who this course is for: