BASIC JAVA PROGRAMS FOR BIGINNERS

        Hi, now i am going to post about the java language and some basic programs on it. these programs may be useful for the graduate level core java. In parallel i will post the programs for the advanced level.Now as a basic programmer you need to implement the experiments on the programs by modification on statements while in the execution process



To do this you require to install the software called  " jdk for java se(standard edition)" availiable at .



http://www.oracle.com/technetwork/java/javase/downloads/index.html



and notepad as a text editor.



As a formality i am posting "Hello World!" as a starting program

class HelloWorldExample{
    public static void main(String[] args) {     

System.out.println("Hello World!");
    }
}

--EVERY PROGRAM IN JAVA ARE IN THE FORM OF CLASSES

  that's why we used  "class" as starting line with the unique name for its class  as "HelloworldExample"

--Next one is MAIN METHOD

   In the Java programming language, every application must contain a main method whose signature is:

public static void main(String[] args)

The modifiers public and static can be written in either order (public static or static public), but the convention is to use public static as shown above. You can name the argument anything you want, but most programmers choose "args" or "argv". Here the main method is an entrance to the program, so absolutely it is required. 

public indicates that the main() method can be called by any object. 

static indicates that the main() method is a class method. 

void indicates that the main() method has no return value.

 compile it with

javac HelloWorldExample.java

run it with the command 

java HelloWorldExample 

The output can be   
Hello World!

That's about the basic story of a hello world program in java. If you know more explanation please post it in comments.