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Java agents are divided into static agents and dynamic agents. Dynamic agent is divided into JDK dynamic agent and cglib dynamic agent. In terms of various performance tests, JDK is better than cglib. It is strongly recommended to master the agent mode, interview high-frequency questions, and use the concept of aspect oriented programming (A ...

Introduction and example of builder mode Builder pattern is one of the creative patterns, which is very commonly used in object-oriented programming The key of the builder pattern is to separate the construction process of complex objects from its own representation, so that the same construction process can create different representations. ...

1. Hungry Han Style (Static Constant) The steps are as follows: Privatization of constructors (prevent new)Create objects inside classesExpose a static public method to the outside world. getInstancecode implementation public class SingletonTest01 { public static void main(String[] args) { //test Singleton instance = Singleton.getI ...

Reference resources: Android animation summary 1. Frame animation That is, play a series of pictures in order to achieve the animation effect. design sketch: Implementation method: Create three bitmaps in the drawable directory, which are three pictures to play a_0.xml <vector xmlns:android="http://schemas.android.com/apk/res/and ...

The previous article has introduced the method of obtaining the current location, which has a problem: there is a deviation of about 500 meters from the actual location. Cause investigation After some investigation, it is concluded that the gps signal uses WGS-84 coordinate system, while Gaode map uses GCJ-02 Mars coordinate system. Only af ...

In real life and programming, it is often necessary to access various elements in an aggregate object, such as the linked list traversal in the "data structure". The usual practice is to put the creation and traversal of the linked list in the same class, but this method is not conducive to the expansion of the program. If you want to ...

1, Decoration mode: 1. Basic theory: Decoration pattern: dynamically add some additional responsibilities to an object. In terms of adding functions, decoration pattern is more flexible than generating subclasses Decoration mode summary: A way to dynamically add more functions to existing functions. When the system needs new functionality, ...

Business practice training of design mode This paper summarizes how to combine the business and implement it in the whole business project by putting the commonly used design patterns into practice. Some come from real business scenarios, some from large factories, and some from classic cases in the open source framework. It's just fo ...

summary For some reason, an object needs to be provided with a proxy to control access to the object. At this time, the access object is not suitable or can not directly reference the target object. The proxy object acts as an intermediary between the access object and the target object. Agents in Java can be divided into static agents and dy ...

Catalogue of series articles Design pattern - design principle Create mode - singleton mode (I) Creation mode - factory mode (II) Creation mode - prototype mode (III) Creative mode - builder mode (4) Structural mode - adapter mode (I) Structural mode - bridge mode (II) Structural mode - decorator mode (III) Structural mode - combined mode ...