Introduction
SPlesson Java Tutorial will guide and explains each and every concept in Java, to learn Java user do not need to have knowledge of other languages, without knowing other languages it is simple to learn without any confusion.
Description
Initially Java is called as OAK, in the 1995 it is renamed as Java, as part of Java some modules are there like Core Java is utilized to develop stand alone applications and it will be in the form of two tier architecture. Advanced Java is utilized to develop the web applications by using Servlets, JSP and it will be in the form of three tier architecture. The Java enterprise edition is utilized to develop distributed applications and it will be in the form of the entire architecture. As part of Java JME (Java mobile edition) is utilized to develop mobile applications.
Description
The small team of engineers, known as Green Team( James Gosling, Mike Sheridan and Patrick Naughton), initiated the language in 1991. Java was originally called OAK, and was designed for handheld devices and set-top boxes. Oak was unsuccessful.So in 1995, Sun changed the name to Java.Later in 2009, Oracle Corporation acquired Sun Microsystems and took ownership of two key Sun software assets Java and Solaris.
Basic Code
[java]Class Splessons{
public static void main(String args[]){
System.out.println("Stop thinking Start coding");
}
}[/java]
In the above example, Splessons is the name of the class and void is the return type and println is used to print the statement.
Output: Now compile the code result will be as follows.
[java]Stop thinking Start coding[/java]
out is an object PrintStream class defined in System class. out is declared as public, static and final.
The println() is a method of PrintStream class.
The println() method is called with out object.
The out object is called with System class.
Table
The following are the versions of the Java.
Features of Java 8
| Name | Date |
|---|---|
| JDK Alpha and Beta | 1995 |
| JDK 1.0 | 23rd Jan 1996 |
| JDK 1.1 | 19th Feb 1997 |
| J2SE 1.2 | 8th Dec 1998 |
| J2SE 1.3 | 8th May 2000 |
| J2SE 1.4 | 6th Feb 2002 |
| J2SE 5.0 | 30th Sep 2004 |
| Java SE 6 | 11th Dec 2006 |
| Java SE 7 | 28th July 2011 |
| Java SE 8 | 18th March 2014 |
- Date and Time API.
- Lambda Expression.
- Nashhorn JavaScript Engine:Elite execution of JavaScript is coordinated to JDk and is accessible to Java applications by means of existing APIs.
- Security Improvement
Editions
1. Java Standard Edition: It is the Standard Edition for the Core Java application.
Eg: Calculator.
2. Java Enterprise Edition: It is the Enterprise Edition for the Enterprise application/Web application.
Eg: Gmail
3. Java Micro Edition:It is Micro Edition for Mobile application.
Eg: Android
Description
Main 2 java components are Compiler and Interpreter.These are also called as Translators.
Interpreter:
Interpreter translates program one statement at a time.
Interpreter takes less amount of time to analyze the source code but the overall execution time is slower.
Programming language like Python, Ruby use interpreters.
Compiler:
Compiler scans the entire program and translates it as a whole into machine code.
Compiler takes large amount of time to analyze the source code but the overall execution time is comparatively faster.
Programming language like C , C++ use compilers.
Compiler is a computer program that transforms source code written in programming language into another computer language(target language often having binary form called object code).
Translates high level language--->low level language.
An Interpreter translates high level instructions into an intermediate form,which it then executes.(It interprets code line by line).