Useful Methods for Lists,Java provides the methods for creating a list from an array, for sorting a list, and finding maximum and minimum element in a list, and for shuffling a lis...

The ArrayList Class,An ArrayList object can be used to store a list of objects. Now we are ready to introduce a very useful class for storing objects. You can create an array to st...

The Object’s equals Method,Like the toString() method, the equals(Object) method is another useful method defined in the Object class. Another method defined in the Object class t...

Casting Objects and the instanceof Operator,One object reference can be typecast into another object reference. This is called casting object. In the preceding section, the stateme...

Choosing Between AIOHTTP and Requests: A Python HTTP Libraries Comparison, Introduction In software development, especially in web services and applications, efficiently handling H...

Dynamic Binding,A method can be implemented in several classes along the inheritance chain. The JVM decides which method is invoked at runtime. A method can be defined in a supercl...

Docker running Python code without copying the files,I never liked the idea to messy all installations in our host computer to run any kind of programming language. Mainly because ...

Polymorphism,Polymorphism means that a variable of a supertype can refer to a subtype object. The three pillars of object-oriented programming are encapsulation, inheritance, and p...

The Object Class and Its toString() Method,Every class in Java is descended from the java.lang.Object class. If no inheritance is specified when a class is defined, the superclass ...

Overriding vs. Overloading,Overloading means to define multiple methods with the same name but different signatures. Overriding means to provide a new implementation for a method i...

Overriding Methods,To override a method, the method must be defined in the subclass using the same signature and the same return type as in its superclass. A subclass inherits meth...

Qt入门之概述,1.概述 1.1 介绍 Qt：它是一套基于C++的跨平台开发框架，包括GUI、字符串、多线程处理、文件IO、网络IO、3D渲染等 时间：它诞生于1991年，由Haavard Nord和Eirik Chambe-Eng共同缔...