Java | How to start learning Java

Java is one of the most popular and widely used programming language and platform. A platform is an environment that helps to develop and run programs written in any programming language.
Java is fast, reliable and secure. From desktop to web applications, scientific supercomputers to gaming consoles, cell phones to the Internet, Java is used in every nook and corner.

About Java

  • Java is a simple language: Java is easy to learn and its syntax is simple and easy to understand. It is based on C++ (so easier for programmers who know C++). Java has removed many confusing and rarely-used features e.g. explicit pointers, operator overloading etc. Java also takes care about memory management and for that, it provides an automatic garbage collector. This collects the unused objects automatically.
  • Java is a platform-independent language: The programs written in Java language, after compilation, are converted into an intermediate level language called the bytecode which is irrespective of the machine on which the programs run. This makes java highly portable as its bytecodes can be run on any machine by an interpreter called the Java Virtual Machine(JVM) and thus java provides ‘reusability of code’.
  • Java is an object-oriented programming language: OOP makes the complete program simpler by dividing it into a number of objects. The objects can be used as a bridge to have data flow from one function to another. We can easily modify data and function as per the requirement.
  • Java is a robust language: Java programs must be reliable because they are used in both consumer and mission-critical applications, ranging from Blu-ray players to navigation systems.
  • Java is a multithreaded language: Java can perform many tasks at once by defining multiple threads. For example, a program that manages a Graphical User Interface (GUI) while waiting for input from a network connection uses another thread to perform the wait instead of using the default GUI thread for both tasks. This keeps the GUI responsive.
  • Java programs can create applets: Applets are the programs which run on web browsers.
  • Java does not require any preprocessor: It does not require inclusion of header files for creating a Java application.
  • Therefore, Java is a very successful language and its need is certainly going to increase day by day.

    Important tips and links to get you started

    1. Firstly understand the basics:
      Learning the basics of any programming language is very important. It is the best headstart. Marking the doubts and clearing them regularly will lead to success. Try to get the concept behind any logic and don’t try to mug it up, that’s very important. Start, get familiar with the environment, and slowly you’ll get used to it within no time. Here are a few links to get you started:

    2. Patience is the key:
      Many a time it will be overwhelming but be patient, learn at your own pace, don’t rush. Mastering Java is not a one day process. And remember even the best coders would have had started at some point. So it’s not a big deal, you can also do it. Give it your time. Patience is the key to success.
    3. Practice Coding
      Once you’ve understood the basics, the best thing to brush up your skills is a regular practice. True knowledge comes only when you implement what you’ve learned, as is said ‘Practice Makes a Man Perfect’. So, code more than you read. This will build your confidence. Remember Perfect Practice makes you Perfect.
      Practice Coding: You can increase your coding skills here. Happy Coding!
    4. Read about Java regularly
      Continuously read about the various topics in Java and try to explore more. This will help to maintain your interest in Java.
      Go through this link to explore the vast world of Java:
      Explore Java >>
      Recent articles on Java >>
    5. Study in a group
      Group study is a better way to learn something. This way you get to know about new things about the topic as everyone presents their ideas and you can discuss and solve your doubts on the spot. So try and make a common group of people who are willing to learn java.
      You can take help of a tutor and can also refer to any of the books if you want. There are many good books in the market that’ll help you in learning java.

    Setting up Java

    You can download java from here. Here you will find different versions of java. Choose and download the one compatible with your operating system.
    For detailed instructions for setting up of Java, refer this article.

    After you have set up the Java environment correctly, try running this simple program:

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    // A Java program to print GeeksforGeeks
    public class GFG {
        public static void main(String args[])
        {
            System.out.println("GeeksforGeeks");
        }
    }

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    Output:

    GeeksforGeeks
    

    If the environment is setup correctly and the code is correctly written, you shall see this output on your console. That is your first Java program!



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