Chain of Responsibility Design Pattern
Chain of responsibility is a behavioral design pattern. This design pattern provides that your request that was created pass respectively to a chain of handlers and each handler de...
Flyweight Design Pattern
Flyweight is a structural design pattern like Adapter, Composite, and Observer. This design pattern provides the minimization of creating similar objects and reduces memory usage i...
Composite Design Pattern
Composite is a structural design pattern that composes objects into tree structures and work with these structures as if they were individual objects.We often see small pieces are ...
Builder Design Pattern
Builder Design Pattern is a creational design pattern. Builder pattern builds a complex object using simple objects and using a step by step approach.For example, we have three ins...
Singleton Design Pattern
Singleton is a creational design pattern. This pattern involves a single class which is responsible to create an object while making sure that only single object gets created. It i...
How to Compile and Run Java Program from Command Line
We can learn Java much easily by using command line to compile and test your examples.Once we know the Java syntax very well, we can switch to an integrated development environment...
Records
Did you realize that some classes in the application are being used only to hold or transfer data? In addition to that, these classes often contain lots of codes (equals, hasCode, ...
Annotations
According to Wikipedia, an annotation is a form of syntactic metadata that can be added to Java source code. Classes, methods, variables, parameters and Java packages may be annota...
Big O Notation — 2
How does “Recursive Algorithm Complexity” calculate ? For this problem we can use “Master Theorem”. According to this theorem, recursive relation doesn’t solve who evaluates as asy...
Big O Notation - 1
What is the Big O Notation ? According to Wikipedia, Big O notation is a mathematical notation that describes the limiting behavior of a function when the argument tends towards a ...