Coding Standard - MamunOrRashid/Online-Bus-Ticket-Reservation-System GitHub Wiki

              `Java Naming Conventions`

1. Classes and Interfaces : Class names should be nouns, in mixed case with the first letter of each internal word capitalised. Interfaces name should also be capitalised just like class names. interface Bicycle class MountainBike implements Bicyle interface Sport class Football implements Sport

2. Methods: Methods should be verbs, in mixed case with the first letter lowercase and with the first letter of each internal word capitalised. Examples: void changeGear(int newValue); void speedUp(int increment); void applyBrakes(int decrement);

3. Variables: Variable names should be short yet meaningful.

   • Should not start with underscore(‘_’) or dollar sign ‘$’ characters.

   • Should be mnemonic i.e, designed to indicate to the casual observer the intent of its use.

   • One-character variable names should be avoided except for temporary variables.

   • Common names for temporary variables are i, j, k, m, and n for integers; c, d, and e for characters. Examples:

     int i_speed = 0;
             int i_gear = 1;
             Private field   datatype_listItem
             Variable        datatype_listOfValues
             Swing :
                   EditText: etName_uiName Example: etUserName_login
                   Button: btnName_uiName  Example: btnCreate_backToLogin 
     

4. Constant variables:

   • Should be all uppercase with words separated by underscores (“_”).
   • There are various constants used in predefined classes like Float, Long, String etc. Examples: static final int MIN_WIDTH = 4; public static final float POSITIVE_INFINITY = 1.0f / 0.0f; public static final float NEGATIVE_INFINITY = -1.0f / 0.0f; public static final float NaN = 0.0f / 0.0f;

5. Packages:

   • The prefix of a unique package name is always written in all-lowercase ASCII letters and should be one of the top-level domain names, like com, edu, gov, mil, net, org.

   • Subsequent components of the package name vary according to an organisation’s own internal naming conventions. Examples: com.sun.eng com.apple.quicktime.v2

      // java.lang packet in JDK
                java.lang
     

6. Parenthesis: public void pickup() {

   }

///// if() {

} // first = second; first = first + second;