In today's Java programming tutorial, we will learn some networking basics by exploring the java.net package. One of the simple Java network programming exercises, yet very useful, is to write a program to find the IP address of the local host in Java. Sometimes this question is also asked to find the IP address of the Server on which your Java program is running or find the IP address of your machine using Java etc. In short, they all refer to localhost. For those who are entirely new in the networking space, there are two things to identify a machine in a network, which could be LAN, WAN, or The Internet.
10 points on TCP/IP Protocol, Java Programmers should Know
TCP/IP is one of the most important protocol as its backbone of HTTP, internet and most of the communication happens today. It's also important from technical interview perspective, you might have already seen difference between TCP and UDP multiple time during interviews ( I have seen). I believe every programmer, not just Java developer should know what is TCP/IP protocol? How it works and the below points I am going to mention. These are basic points and most of you already know but during Interview I have found many developers who doesn't really know what TCP/IP offers and how it works and what are the pros and cons of TCP/IP protocol. That's where, I think this article will help you. Anyway, let's jump into technical details now.
How to send HTTP Request from a Java Program - Example Tutorial
If you are thinking is it possible to send an HTTP request from a Java program and if yes, how to send a simple HTTP GET request in Java, then you have come to the right place. In this article, I'll show you how you can use the HttpURLConnection class from the java.net package to send a simple HTTP request in Java. But, first, let me answer your first question, is it possible to send an HTTP request in Java? Yes, it's possible and you can send any kind of HTTP request like GET, POST, PUT, DELETE, HEAD, or PATCH. The java.net package provides a class called HttpURLConnection, which can be used to send any kind of HTTP or HTTPS request from Java program.
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