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Style Issues

Program Format:

//printing a message on the screen
//notice the format of the code

public class HelloClass {
     public static void main (String[ ] args) {
          System.out.println ("Hello, Java world!");
          System.out.println ("I plan to be a Java expert!");


Notice the format style that we will be using.  The indentations keep the code clearly visible and easy to read. 

It is possible, in Java, to write all of your code on one line -- this is called free form style.  Free form style is extremely difficult to debug at a later date and is nearly impossible for a programming team to decipher.  We will NOT be using free form style.

Case sensitivity:

   if (netpay > grosspay)

   If (NetPay > GrossPay)



Java is very picky about your caps lock key.  The three lines of code at the left, at first glance, may appear to all say the same thing.  The Java compiler, however, will only execute the first line of code.  Most Java code is written in smaller case and ALL reserved words (such as "if") MUST be written in smaller case.

//printing another message on the screen
//notice the commented lines
public class HelloAgainClass {
     public static void main (String[ ] args)  {
          System.out.println ("Hello!");  //first print
          System.out.println ("I just love this Java!");
/*sometimes comments are longer statements that
wrap around to the next line on the screen*/


In Java, comments may be expressed in different forms.

  The comments beginning with // are single line comments.  They can appear on a line by themselves, or they may follow other lines of code.

The comments enclosed within /* and */ are used for longer comments that wrap around a line.


Blank Space:

//notice the spacing in this code
public class HelloStillClass {
     public static void main (String[ ] args)  {
          System.out.println ("Java rocks!");

          System.out.println ("A real space cadet!");


The compiler ignores extra blanks between words and symbols.

Blank lines between lines of code are also ignored.  Notice the blank line between the two print statements.

You cannot, however, embed blanks in variable names.

The use of blanks can improve readability when appropriately placed.


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