Coding Practices for Java

[shazin]

There are two main practices which are, if followed can make your
java code much more optimal, flexible and less error prone.

Those are;

1. Never create a Has-A relationship with an implementation, Use an interface whenever possible. This is because if you use a Has-A relationship with an implementation your code will be tightly coupled with that implementation which is not good for maintenance.
2. Use Object composition over inheritance, This will make your code more flexible than code with inheritance.