Java is a programming language which follows an object oriented programming paradigm. From laptops to data centers, gaming consoles to scientific supercomputers, mobile phones to net, java is everywhere.Java turns into one of the most popular programming languages with numerous reasons. This programming language has many advantages, which include can run in different operating system, Object Oriented Programming (OOP), and has whole library that will greatly facilitate programmers, so it’s very powerful. And these days is the era where Android smartphones are very widely used. Applications in the Android smartphone are constructed using the Java language.
Java is open source technology. It method you could see the source code, and develop and custom it consistent to your own purpose. Java is used to develop numerous types of applications,from console software desktop application, enterprise-scale application, to mobile application. To fulfill the specific applications desire.
Levels of Java.
- Java: This is the basic level, in which you can discover ways how to write a Hello World program in Java and create basic Java programs for Calculator etc.
- Core Java: At this level, you have to gain expertise in Java Collections, Java Multi-threading, OOPS concepts, Polymorphism, Java Exception handling etc. This is the extent at which you can get a Job in a company.
- Advanced Java: As the name suggests, at this level you are antici anticipated to know not only core Java but additionally related packages etc. You have to know XML handling, JSON parsing, REST service creation etc.
Importance of Java
Java was designed to have the look and feel of the C++ language, but it’s miles less complicated to use than C++ and enforces an object-oriented programming model. Java can be used to create entire applications that could run on a single pc or be distributed among servers and clients in a network.Java is a programming language that developers use to create applications to your computer. Chances are you’ve downloaded a program that required the Java run time, and so that you probably have it installed it on your device Java also has a web plug-in that lets in you to run those apps in your browser.
Features of Java
1) Object oriented
Java is a pure Object oriented . every thing in java is object. all programs and data reside inside objects and classes
Java has networking facilities. so java can create application on network.
Java gives importance to memory management by using the technique called Garbage Collection and Exception handling.
Since java is used on internet, security is an vital issue. A protection code is asked before a java code is interpreted on internet.
5) Platform independent
Java compiler generates an platform independent code called bytecode.
The Bytecode generated by java can be used on any machine. So it can be portable.
7) Compiled and Interpreted
Generally computer languages are either complied or interpreted. but java combines both compiler and interpreted.
8) High performance
The use of bytecode makes the performance high. the speed is also high with comparing c, c++.
9) MultiThreading and interactive
Multithreading means handling more than one job at a time. Java supports Multithreading.
10) Dynamic and extensible
Java is a dynamic language. So it is capable of linking dynamic new classes, methods and objects. Java supports functions wriiten in c and c++ also.These functions are called native methods. During Run-Time Native methods can be linked dynamically.
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