Most Useful Java Programming Tips

Posted in: Core Java

Try to write self-documented programs: Use logical variable names and function names :    
not :  int x;     
but :  int studentCount;

Comments :
Use comments whenever something is unclear. Think that you are telling some other person about your code. (After a long time, this person might be you)
Coding Conventions :

• Class names start with Capital

         class MyClass {

• Instance names, fields, function names start with lower, etc.

         Object  myObject ;
         int myInt ;
         void myFunc() { …

• Static Final variables are All-Capitalized

         static final MAXVALUE = 200 ;

Necessary Tabs and spaces in Blocks. (Theoretically you can write a long program in a single line) 

Use getter, setter, and is methods.

        int getCount() ;
        int setCount() ;
        isEmpty() ;

Self-checking classes 

• Use main() almost in every class to check class functionality. 
• You can make an expected output check, in order to verify changes in the class.

In highly coupled classes, consider to make inner classes.

Keep method definitions and scopes as short as possible. (For easy visualization and readability.)

Compiler-time errors are better then run time errors.

Prefer Interface definition to Abstract Class

       Not : abstract class X { abstract void f() ; }
       But : interface X { void f() ;

Spelling problems in overriding Classes

        class X { void encode() { … } }
        class Y extends X { void Encode() { … } }    // Does not overload the method

Use Java Container Library classes
List l = new ArrayList() ;
Map hm = new HashMap() ;
Set s = new HashSet() ;
List  myStack = new LinkedList() ;

Enter your email address to get our daily JOBS & INTERVIEW FAQ's Straight to your Inbox.

Make sure to activate your subscription by clicking on the activation link sent to your email