Java application development – Specifying Class contracts to avoid guesswork

That would be great when you use Java classes and they lived up their promises. This would be even more amazing if you know the real purpose of a Java class why it was used actually. So, if you agree then continue on reading about iContract and why it is getting so popular over small time period only.

IContract - Specifying Class contracts to avoid guesswork

IContract design technique is mainly used to specify class contracts in order to avoid guesswork. Java application development team also specifies components as part of component interface. Here, you should know about your expectations from components and what component exactly expects from you. Practically, iContract or Design by contract (DBC) is valuable design technique based on Java programming language.


DBC are Boolean expressions that define state of a software system. In case, value of Boolean expression comes true then system is working correctly. If assertions are evaluated to false, software systems are considered broken. DBC is further divided into three major categories – Preconditions, Post conditions, and Invariants.

·         Preconditions – It defines conditions that must hold before some method can be executed. It also includes system state or arguments that need to pass through method.

·         Postconditions - It defines conditions that must hold once method has been executed. It also includes state of old system, new system, method arguments and its return value. If post conditions are not followed properly then software may return bug.

·         Invariants – Invariants should hold conditions that must hold when object method is invoked. They can be evaluated anytime before or after methods are executed. If variants are not followed properly then software may return bug.

To know about actual implementation of DBC and how it can be utilized with your software system, you should contact Java application development team right away.