JAVA PROGRAMMING
A
Closer look at the First Program
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Although hello.java is quite short, it
includes several key features which are common to all Java Programs. Let's
closely examine each part of the program.
The programs begin with the following lines:
/* This
is Comments
This is
a simple Java program call this file "hello.java".
*/
This is a comment. Java lets you enter a remark into a program. The
contents of a comment are ignored by the compiler.
class hello {
This line uses the keyword class to declare that a new class is being
defined. hello is an identifier that is the name of the class.
public static void main(String[] args)
This line begins the main() method. All Java applications begin execution
by calling main(). The public keyword is an access
specified, which allows the programmer to control the visibility of class
members. The keyword static allows main() to be called
without having instantiate a particular instance of the class. The
keyword void simple tells the compiler that main() does not
return a value. String args[ ] , declares a named args, which is an
array of instances of the class String.
System.out.println("Hello World, You are
welcome");
This line outputs the string "Hello World, You
are welcome." followed by a new line on the screen.
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