This HelloWorld program to java world

We can step into the world of java by this simple program

1. class JavaDemo{
2. public static void main(String Args[])
3. {
4. System.out.println("HelloWorld!");
5. }
6. }

• Line1: Every java program starts with class keyword and followed by user defined class names
• Line2:
  * public: The method can be accessed outside the class / package
  * static: You need not have an instance of the class to access the method
  * void: Your application need not return a value, as the JVM launcher would return the value when it exits
  * main(): This is the entry point for the application
• Line 3: curly braces opens here or just immediately after method name
• Line4 : Printing the String constant into the console
• Line5 : close the bracket for method
  
• Line 6 : close the bracket for class JavaDemo

In order to run this program you have to compile this program into bytecode by the command ->javac JavaDemo.java
And Run the program by typing the below command
-> java JavaDemo
You can see the following output
HelloWorld!



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