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Merge Sort Algorithm

Learn more about the merge sort algorithm The core idea of ??the merge sort algorithm is the divide and conquer method, that is, "divide and conquer". It recursively divides an array into smaller subarrays until each subarray contains only one element (which is now sorted). It then merges these subarrays into a larger sorted array. It is worth noting that the sorting process occurs during the merge phase, not the split phase. Algorithm demonstration Suppose we have an array to be sorted: We divide the array into two left and right subarrays: Continue recursive splitting until each subarray has only one element: Next, merge and sort these subarrays: smaller values ??on the left, larger values ??on the right. Final sorting: Code implementation (Java) The original J

Jan 21, 2025 pm 10:04 PM

Difference Java ByteArrayOutputStream.write(int n) with ByteArrayOutputStream.write(byte[] b, int off, int len)

This example demonstrates downloading an image from a URL using Java's InputStream and OutputStream. Two code snippets are presented, differing in their use of the OutputStream.write() method. Let's analyze the results. Method 1: write(byte[] b, int

Jan 21, 2025 pm 06:05 PM

Interface Segregation Principle (ISP) Explained in Seconds

? Interface Segregation Principle (ISP) Explained Simply The ISP, a core component of the SOLID design principles, states: Clients shouldn't be forced to depend on methods they don't use. Overly broad interfaces, packed with unrelated methods, lead

Jan 21, 2025 pm 12:07 PM

Object Orientation in C? Implementing an interface from scratch.

I have always been curious about computers and always thought: "Okay, I know how to use it, but how does it really work?" In the process, I often do a thought experiment: What if I implement it from scratch? It, what would I do? In this article, we will explore how interfaces work in object-oriented programming (using Java), and then implement a humble version of the interface in C. Let's look at an example Our example is simple: calculate the price of a vehicle. If it's a car, the price will be based on its top speed; if it's a motorcycle, the price will be based on its displacement. We first define the behavior of the vehicle using an interface: public class Main { public interface

Jan 21, 2025 am 10:05 AM

Implementation of jaxb-api has not been found on module path or classpath. Error Solution

Java applications may encounter the following errors when using Java Architecture for XML Binding (JAXB): javax.xml.bind.JAXBException: Implementation of JAXB-API has not been found on module path or classpath. - with linked exception: [java.lang.ClassNotFoundException: com.sun.xml.internal.

Jan 21, 2025 am 08:07 AM

Design Patterns Serie — Structural Chapter: Proxy Pattern

Design patterns: efficient solutions for common software development challenges. These pre-built solutions prevent "reinventing the wheel," offering answers to frequently recurring problems. However, they aren't one-size-fits-all; develop

Jan 21, 2025 am 04:06 AM

Understanding the QuickSort Algorithm: Divide and Conquer

In the world of computer science, QuickSort stands out as one of the most efficient and widely used sorting algorithms. Its remarkable speed in sorting large data sets is due to its "Split to Split" strategy.

Jan 21, 2025 am 02:18 AM

Anonymous classes in Java

Anonymous classes in Java are unnamed classes, ideal for defining and instantiating implementations of classes or interfaces in-place, without the need for additional files. Its single-use nature prevents its reuse. Unlike the classes

Jan 20, 2025 pm 10:33 PM

Keyword:Abstract-Extends,Interface-Implements

Java abstract Keyword The abstract keyword is used to achieve abstraction in Java. It is a non-access modifier which is used to create abstract class and method. The role of an abstract class is to contain abstract methods. However, it may also con

Jan 20, 2025 pm 10:20 PM

Understanding Generics in Java: A Shopping Cart Example with Custom Classes

Java generics are essential for writing type-safe, reusable code. They enable the creation of classes, methods, and interfaces that can handle various data types, enhancing code robustness and flexibility. This article illustrates generics using a s

Jan 20, 2025 pm 10:14 PM

What is the null literal and how can it be used in Java applications?

NullPointerExceptions: A common Java pitfall. Let's explore the null literal and its uses in Java programming. Feel free to add your insights in the comments! In Java, null signifies the absence of a value or a reference that doesn't point to any o

Jan 20, 2025 pm 10:11 PM

Compression algorithms in Parquet Java

Apache Parquet is a columnar storage format targeted at analytical workloads, but it can be used to store any type of structured data, addressing a variety of use cases. One of its most notable features is the ability to efficiently compress data using different compression techniques at both stages of the processing process. This reduces storage costs and improves read performance. This article explains Parquet's file compression in Java, provides usage examples, and analyzes its performance. compression technology Unlike traditional row-based storage formats, Parquet uses a columnar approach, allowing the use of more specific and efficient compression techniques based on locality and value redundancy of the same type of data. Parquet is written in binary format

Jan 20, 2025 pm 06:04 PM

Tomcat Architecture Series-verview & Basic Concepts

A Deep Dive into Tomcat Architecture: A Comprehensive Guide ? introduction Apache Tomcat is one of the most popular Java web servers and servlet containers, powering millions of web applications around the world. This article will provide a comprehensive overview of Tomcat's architecture to help developers understand its inner workings. Table of contents What is Tomcat? Architecture overview core components Request processing flow Key Features best practices What is Tomcat? 1.1 Brief history First released in 1999, Tomcat has evolved significantly over the years, with the latest stable version being To

Jan 20, 2025 pm 12:07 PM

Passing Properties in Java

Java Property Passing Mechanisms: A Comprehensive Guide Java's parameter-passing mechanism is crucial for developers. This guide explores the various ways properties are passed in Java, impacting data manipulation within methods and classes. Java emp

Jan 20, 2025 am 06:06 AM