| The CODE: |
Information about the code: |
/**********************************
*Project: LabOneA
* @author John Smith
*Date: September 3
*Program Name: Hello.java
**********************************/ |
All programs should begin with a comment identifying
the purpose of the program and the programmer.
/**documentation */ - documentation commenting.
/* text*/ - is the format for block commenting.
// text - is the format for single line commenting.
Comment statements are ignored by the compiler. It is a
message to the reader of the code. |
public class Hello
|
Every Java program is a class. The program starts with the
name of the class. This name must be the same name as the .
java file in your folder. In this case the
file is saved as Hello.java.
Class names must begin with
a letter, an underscore or a dollar sign.
Class names may contain only letters, digits, underscores
and/or dollar signs.
Class names may not use reserved words. |
| { |
A set of
French curly braces { } is needed for every class. As seen at the top of the page, the placement of the curly brace may be on the SAME line as public class Hello, or on a line by itself. |
| public static void
main (String[ ] args) |
A main
method is needed for execution to have a place to start. This
main method gets executed first. The idea of static will be
discussed later. The array of strings parameter is a
necessity. |
| { |
A set of
French curly braces { } is needed for main.
Again, placement may vary. Just be consistent. |
System.out.println("This is a literal print.");
System.out.print("Yea!");
System.out.println("Go Java!"); |
Output statements: the
basic output statement in Java is the System.out.println( )
statement.
The System.out.println( ) line will print what is between the
double quotes" " (called a literal print) and move the printing
cursor to the next line.
The System.out.print( ) line will print what is between the double
quotes and leave the printing cursor on the same line. |
}
} |
The first } closes main method and the second closes the class Hello. They are always used to end the program. |
