free vector pattern design

backgroundThe last time I went to the cinema to see a movie, half the sister said that as long as the sweep can be free to collect popcorn, you say how I hide from the sister's tricks? So pick up my cell phone, sweep, register the membership, OK to collect popcorn. Time passed, I found that my phone is always getting some messy information, once there is any big thing I will receive information, you can know I refused. Well, here's the observer

Design Pattern _ Observer PatternObserver Pattern Define a ont-to-assign dependency between objects so that when one object changes state, all its dependents are notified and updated automatically. (define a one-to-many dependency between objects so that every time an object changes its state, all objects dependent on it will be notified and automatically updated

Original address: http://www.cnblogs.com/zhili/p/SingletonPatterm.htmlFirst, IntroductionAfter this period of time on the design pattern of learning, their feelings are still a lot of, because I now write code, often think of here can use what design mode to reconstruct. So, after you finish the design

First, IntroductionAfter this period of time on the design pattern of learning, their feelings are still a lot of, because I now write code, often think of here can use what design mode to reconstruct. So, after you finish the design pattern, you feel it will slowly affect t

select the two endpoints of the two helix centers, and then press the shortcut key ctrl+j to weld them together, select the Corner radio button if the Connection dialog box appears as shown in Figure 6, and then click OK. This dialog box occurs because two anchor points overlap. Figure 6 7. Use the direct selection tool to select the outermost two endpoints of the two spirals and then press CTRL+J to connect them together. At this point the two spirals become a closed p

Observer patterndefinition: defines a one-to-many dependency between objects so that when each object changes state, all objects that depend on it are notified and updated automatically.Class Diagram:Several [observers] observe the [observed] state, and when the [observed] state changes, the [observer's] own state changes as well.The Observer has three methods: The Attach method is to add the Observer object to the container, the detach method is to remove the observer object from the container,

property used, and this isconstant of the static inner class used. EnumerationGod-like design, there are several reasons for using enumerations to implement singleton patterns:1. Free serialization2. Thread Safety3. Ensure that there is only one instance.public enum Singleton06 {instance;private Singleton06 () {}public void print () {System.out.println ("enum singleton!");}}Call:Singleton06.INSTANCE.print

is not sufficiently interesting. The Singleton pattern can be extended to support access to an application-specific number of instances. The "static member function accessor" approach will not support subclassing of the Singleton class. If subclassing is desired, refer to the discussion in the book. Deleting a Singleton class/instance is a non-trivial design problem. See "To Kill A Singleton" by John Vliss

Design Pattern-builder Pattern Concept: Builder mode separates the creation of a complex object from its representation, so that different representations can be created during the same construction process. The builder model can separate the internal appearance of a product from the product generation process, so that a building process can generate product obje

Basic Concepts Observer mode: defines a one-to-many dependency between objects. When the State of an object changes, all objects dependent on it are notified and updated automatically. This mode is most commonly used in the familiar event-driven model. Event responses in the VC and Android interfaces are implemented based on the observer mode. Meaning of observer Mode Next I will explain my understanding of the observer mode. In fact, this mode is a very common mode in our daily work. You may ha

Date: 2012-7-26 Source: gbin1.com Before usArticleI have mentioned several high-definition wallpapers. Today we want to introduce a background pattern designed with asphalt road textures, because it has a unique and rough texture design, so you can not only use it on your background desktop, but also in other work. The five free ultra-high-resolution texture pat

1. Definition: Provides an entity class that creates a series of related or interdependent object interfaces without specifying them.2. Extension:Each pattern is a solution to a certain problem. The problem of abstract Factory mode is the system design of multi-product hierarchy.Before you learn the concrete examples of an abstract factory, you should understand two important concepts: product family and pr

(); } advantages of the policy model: The algorithm is free to switch This is defined by the policy pattern itself, and as long as the abstract policy is implemented, it becomes a member of the policy family and encapsulates it by encapsulating the role, guaranteeing a "free handoff" strategy. Avoid using multiple conditional judgments If there is n

commercial mouse), or the designer is affected by other products (such as the last time I saw such a shape feel very fresh) ... It's hard to know what the reason is, but our designs are always surrounded by this pursuit, and we call these styles "tricks." For future mouse development has a huge impact on not only this mouse, there is another Apple mouse. ADB Mouse ii,apple The new mouse, launched in 1993, was a big change from the previous mouse, which looked like a piece of wood, square an

); System.out.println ("Remaining space in allocated memory =" + free); SYSTEM.OUT.PRINTLN ("Used memory =" + used); System.out.println ("time =" + System.currenttimemillis ()); System.out.println ("");}}Output resultsMax memory = 259522560 Allocated memory = 16252928 space remaining in allocated memory = 15536784 used memory = 716144 time = 1441355500069 max memory = 259522560 Allocated memory = 194347008 allocated memory remaining space = 32881632 u

other details. When you find that some parts of your program are often changed for some reason, and you don't want the parts of the changes to trigger changes in other parts, you need to think about the design methods that don't change. Doing so will not only make the code more maintainable, but will make the code easier to understand, reducing development costs. Designing an elegant, easy-to-maintain program the difficulty lies in discovering what I

I. Schema Definition The template method mode defines the skeleton of an algorithm in a method, and delays some steps to the subclass. The template method allows subclass to redefine some steps in the algorithm without changing the algorithm structure. Ii. embodied Design Principles Hollywood principle: Do not call (CALL) us. We will call (CALL) You.This principle requires that only the high-level components (such as the template method of abstractcl

separate the unchanging core parts from other details. When you find that some parts of your program are constantly changing for some reason, and you don't want the parts of those changes to cause other parts of the changes, then you need to think about the design methods that don't change. Doing so will not only make your code more maintainable, but it will make your code easier to understand and reduce development costs. The tricky part of designi

harmonious, clearer, more complex and more controllable works.Do not say that you are not a programmer, you can follow the feeling go, arbitrary, of course, we have no right to interfere. I also said, as originally is how to write on how to write, but not contact, learn not to learn advanced thinking mode, this is your freedom. Not to mention that you're an artist, the mind is sensitive, not suitable to contact these, I want to incidentally take the canteen for example, is to explain, I want to

Behavioral patterns (behavior pattern) involves the assignment of tasks between objects and the algorithm for completing these tasks. It not only describes the object pattern or class design pattern, it also describes the interaction mode between objects or classes. Using this desi