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Stream API in Java 8: Complete Guide with Examples
Stream api is a powerful abstraction for processing sequence of elements in a functional and declarative style . it allows developers to perform complex data manipulations such as filtering , mapping , sorting and reducing with minimal boilerplate code . Stream represent a pipeline of operations that can be executed either sequentially or in parallel , improving both readability and performance . Purpose of Stream Api The main goals of the stream api are . 1.Simplify data processing: Replace verbose loops with expressive operations 2.Enable Functional programing : use lambda expressions and method references 3. Improve Performance: Support parallel execution with parallel stream . Pipeline in Java Stream A stream…
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Default and Static Methods in Java 8 Interface – Features & Use Cases
A default method is a method define in an interface with a default implementation .it uses the default keyword and allows interfaces to have behavior without forcing all implementing classes to override it . Syntax: The main purpose of default methods is to enable backward combability when evolving interfaces before java8 , adding a new method to an interface would break all implementing classes with default methods, you can add new functionality without affecting existing code . Features of Default Methods in Java Interface with default method Abstract class Use Cases of Default Methods in Java What is Static Method in an Interface A static method in an interface is…
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Functional Programming in Java Using Lambda Expressions
A lambda expression is a short and concise way to represent an anonymous function—a function without a name . Key Features 1.Why Lambda expression required Lambda expression required to enable functional programming ,lambda expression allow you to define small functions without naming them . this is useful when the function is simple and used only once or a few times . Lambda Syntax : 2.Lambda Expression Example Example 1: Addition of Number Without Lambda Expressions With Lambda Expressions Example 2: Find the length of String without Lambda Expressions With Lambda Expression if single statements are there then curly bracket not required , if body contained multiple lines of code then…
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Anonymous Classes in Java and When to Use Them?
An anonymous class in Java is a class without a name that is both defined and instantiated in a single expression. Developers commonly use anonymous classes to create instances of classes or implement interfaces without writing a separate named class. This helps in writing cleaner and more concise code, especially for short-term or one-time use cases in Java programming. Characteristics of Anonymous classes Anonymous class is Example: Example without Anonymous class 1. Greeting.java (Interface) 2. GreetingImpl.java (Interface Implementation) 3. DemoTest.java Example: Example with Anonymous class 2. DemoTest.java Explanation of Above code : Anonymous Inner classes An anonymous inner class in Java is a way to define and instantiate a class…
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What is application
An application refers to a program or software designed to perform specific tasks for users. Applications can range from simple tools like calculators to complex systems such as enterprise resource management platforms. Types of Applications To develop distributed application we use a language called java and java comes under internet software. Architecture required for development of distributed application , programmer must use a well known Architecture known as client server architecture . 2-Tier Architecture Two tier Architecture it contains client and server side programing . 3-Tier Architecture Three tier architecture it contains client , server program and database software n-Tier Architecture n tire architecture it contains client program , fire wall program(security…