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A Deque is a linear collection that supports element insertion and removal at both ends. The name deque is short for “double ended queue” and is usually pronounced “deck”. The Deque interface defines methods to access the elements at both ends of the deque. Methods are provided to insert, remove, and examine the element. Each […]Continue reading

In Java, you use the enumeration type to represent a list of predefined constants. But, what if you want to implement a Set interface with the enumeration type, you have got EnumSet in Java to do so. Enum constants are unique and have predefined length, as you can not define a new enum constant at […]Continue reading

There are read-only wrappers over collections which are known as unmodifiable lists. These lists do not support any modification operations such as add, remove, and clear. Hence, these kinds of lists which guarantee that no change in the Collection object will ever be visible are termed as immutablelist. The Java Collections framework provides the unmodifiableList() […]Continue reading

The Spring Ioc container is at the core of the Spring Framework. BeanFactory and ApplicationContext provide implementations of the IoC container. Both BeanFactory and ApplicationContext are interfaces and there are several implementations that come out of the box with Spring. In this post, I will explain the differences between BeanFactory and ApplicationContext. Major Differences between […]Continue reading

The Spring framework has a library called Spring State Machine which is a model of computation that depends on the finite states. It can only be in one state at a given time, hence it is also called a finite state machine. The transitions of this State Machine are the changes in the status of […]Continue reading