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![Java example
Class Simple
{
public static void main (String arg[])
{
System.out.println(“Hello Java”);
}
}
// To compile this code in cmd :
Javac <filename>.java
//To run this code :
Java <classname>](https://image.slidesharecdn.com/javappt-180929174417/85/core-java-9-320.jpg)
![Java example
Class Simple
{
public static void main (String arg[])
{
System.out.println(“Hello Java”);
}
}
// To compile this code in cmd :
Javac <filename>.java
//To run this code :
Java <classname>](https://image.slidesharecdn.com/javappt-180929174417/75/core-java-9-2048.jpg)
![UiPath Automation Suite Installation (Hands-On) [2/3]](https://cdn.slidesharecdn.com/ss_thumbnails/automationsuitecommunitysession2-251015095633-a6d862f1-thumbnail.jpg?width=600ounds&width=560&fit=bounds)
core java
- 1. Write once runanywhere A presentation on core java by : Roushan Kumar sinha B.Tech – I.T (4th yr.)
- 2. Contents What isjava ? Where java used ? java platforms / Editions Feature of java. Java virtual machine. Java Architecture. Why java is platform independent ? What is oop ? Concept of oop. Data types in java.
- 3. What is java? Java is a high level object oriented programming language as well as platform. Java was developed by a team led by James Gosling at Sun Microsystems and released in 1995. Java runs on a variety of platforms such as Windows, mac os , and the various version of UNIX.
- 4. Where java used? According to sun , 3 billion devices run java. There are many Devices where java is currently used. Some of them are as follows: Desktop applications such as acrobat reader , media player , antivirus ,etc. Web Applications such as Irctc , javatpoint.com , linkedin ,etc. Enterprise applications such as banking applications. Mobile Embedded system Smart card Robotics Games ,etc
- 5. Java platforms /Editions Java Java SE (java standard edition)Java EE(java Enterprise edition) Java ME (java micro Edition) javaFx
- 6. Features of java Objectoriented Simple Platform independent Robust Architectural neutral Portable Secured Interpreted Multithreaded Dynamic
- 7. JVM JVM (javavirtual machine) is an abstract machine . It is a specification that provides runtime environment in which Java bytecode can be executed. JVMs are available for many hardware and software platforms . (i.e. JVM is platform dependent) JVM performs following operation: Loads code Verifies code Execute cod Provides run time environment
- 8.
- 9. Java example Class Simple { publicstatic void main (String arg[]) { System.out.println(“Hello Java”); } } // To compile this code in cmd : Javac <filename>.java //To run this code : Java <classname>
- 10. Why java isplatform independent ?
- 11. What is oop? Object oriented programming is a method of implementation. A language in which everything is represented in the form of object is called object oriented programming language. Java follow the oop’s concept but not 100 percent. Simula is considered as the first object – oriented programming language. The popular object oriented languages are java , c# , Python ,c++,etc.
- 12. Oop’s concept • Object •Class • Inheritance • Polymorphism • Abstraction • Encapsulation
- 13. Data types injava
- 14. Java variables 1. Localvariable : A variable declare inside the body of method is called local variable. 2. Instance variable : A variable declare inside the class but outside the body of the method but it is not declared as static. 3. Static variable :A variable which is declared as static is called static variable . It cannot be local . single entity can be shared among multiple objects. Static variable allocated only one time in memory when class is loaded.
- 15. Advantages of java Java is simple language. Java does not support POINTERS. Java is the first language in which program can be executed using web. Write once run anywhere.