What is Java ? A Guide for beginners.
Due to the global spread of a deadly pandemic, the Internet and smartphones have become essential tools. We cannot go without a smartphone. In the past, we would go to shopping centres, banks, and travel agencies to complete our daily activities. However, we can accomplish this thanks to smartphones without ever leaving the house. Do you know how this is all possible? You guessed it right because of Java, a high-level programming language.
What is Java?
Java is a popular object-oriented programming language for usage in distributed online environments. In addition to being a highly advanced language, it is also quite readable and understandable. There is no need for developers to recompile their Java code because it will operate on every platform that supports Java. This is known as "write once, run anywhere" (WORA).
History of Java
In 1991 James Gosling and Sun Microsystem developed the java language. He had a single motto while creating the language: “Write once; run anywhere.” This language was originally dubbed Oak after the oak tree that stood outside Gosling's office. The original name, "Green," was altered to "Java Coffee" in honour of Indonesian coffee; in 1995, the name was abbreviated to "Java."
What is Java Used For?
Java is used in many different types of software, including graphical user interfaces, embedded devices, desktop programmes, games, and mobile apps. Java is used for more than only these applications, though. It is used in various electronics, including computers, smartphones, televisions, air conditioners, washing machines, etc. Java has allowed for the creation of online registration systems, banking applications, and e-commerce platforms.
What is Java-Based Upon?
C and C++ are the building blocks of Java. The first Java compiler was made by Sun Microsystems, which was written in C and borrowed a few C++ libraries. The Java interpreter runs a compiler to turn Java source code files into bit code. The Java Virtual Machine (JVM) is the software platform that executes Java programmes.
Editions in Java
Java has three different variants. Programmers can learn any of these editions depending on the app they want to make.
- Java S - Standard Edition - Contains core libraries, like java.lang, java.util, etc.
- Java E - Enterprise Edition has Java APIs like JMS, EJB, JSPs/Servlets, etc.
- Java M- Micro Edition, This edition is used to put Java programmes on cell phones, set-top boxes, handhelds, and other devices.
Java SE is the version of Java used most (Standard Edition). Java SE is the basic version of Java. Most programmes need Standard Edition.
Java Concept and Features
Object-oriented programming (OOPs) is the most important way to think about Java. OOP makes it easier to create software and apps and keep them running by giving us ideas like:
Object: An object means a thing that has a state and acts in a certain way. A dog, for example, is an object that has a colour, a breed, and a name. It barks and eats, among other things.
Class: A class means a group of objects that work together. It's a plan you can use to make as many things as possible. Classes are used to organize code the same way a supermarket has different sections for fruits, vegetables, and medicine.
Constructor: Constructor may look like a method, but it is not. Its name is the same as the class and doesn't give any value back.
Inheritance: is the idea that a class can take on the properties and behaviours of its parent class.
Polymorphism: is when something can do the same thing in different ways. It allows programmers to use the same word differently to mean different things.
Abstraction: In Java, abstraction is a method to hide internal details and only show the most important ones.
Encapsulation: Encapsulation is the process of putting code and data into a single unit, like a capsule. Encapsulation is shown by the way a Java class works.
Java has many features and qualities, such as:
- The simple grammar that is easy to learn and understand
- Java language is robust
- Errors in the C and C++ languages are taken care of.
- Java has things like garbage collectors and handling of errors.
- Java can run on any platform because it is a portable language.
- Java is safe and can do more than one thing at once.
- Java isn't as fast as C or C++, but it's better than any other language in terms of performance.
- Click here to learn the difference between java and c++.
Now that we've discussed the different things that Java can do let's look at what makes up the Java programming language.
Learn how to use the Java Programming Language to solve problems in the real world. This certification focuses on the most important parts of Core Java. After finishing this course, you will confidently know everything you need to make a Java programme that works. Java allows you to make application software and use it in a computing environment that works on different platforms. It is used in many computing platforms, from embedded devices and mobile phones to enterprise servers and supercomputers.