Java Programming Assignment Help
Java is a set of computer software, a general purpose high-level programming language developed by Sun Micro-systems. Later, Oracle Corporation acquired Sun Micro-systems and took ownership of Java. According to Oracle, there are more than 9 million Java developers and more than 3 billion mobile phones run Java. Today Java is often used for delivering content on Web. Java is used in various computing platforms from mobile phone and embedded devices to enterprise servers and supercomputers.
Java is a high level, robust, secured and object-oriented programming language. It is similar to C++ but simplified to eliminate common occurring programming errors. Java source code files also called .java extensions are compiled into byte code files also called .class extensions, which are then executed by Java Interpreter. Java Interpreters and run time environments, known as Java Virtual Machines (JVMs), exist for most operating systems including Windows, UNIX, and Macintosh, so that compiled java code can run on most computers. Byte-code can also be converted directly into machine language instructions by a just-in-time compiler (JIT).
Java is also a platform. Any hardware or software environment in which a program runs, is known as a platform. Since Java has its own run-time environment (JRE) and API, it is called platform. The Java platform is a suite of programs that facilitate developing and running programs. A Java platform includes a Virtual Machine (VM), a compiler and a set of libraries; there may be additional servers depending on requirement. Java platforms have been implemented for a wide variety of hardware and is not specific to any processor or operating system.
Java is general purpose programming language with a number of features that make the language well suited for use on the World Wide Web. Java applications are called Java applets and can be downloaded from a Web Server and run on your computer by a Java-compatible Web Browser. Applications and websites using Java will not work unless Java is installed and enabled on your device. When you download Java, the software contains the Java Run-time Environment (JRE) which is needed to run in a Web Browser.
There are mainly 4 type of applications that can be created using java programming:
1. Standalone Application – It is also known as desktop application or window based application. It is an application that id needed to be installed on every machine. AWT and Swing are used in Java for creating standalone applications.
2. Web Applications – Web applications are the applications that runs on the server side and creates dynamic pages. Technologies that used to create web applications in java includes Servlets, jsp, Struts etc.
3. Enterprise Application – It is an application that is distributed in nature. It has the advantage of load balancing, high level security and clustering. EJB is used for creating enterprise applications in java such as banking applications.
4. Mobile Applications – Is is an application that is created for mobile devices. Android and Java ME are used creating mobile applications.
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