Factory pattern - understand Spring's Bean factory (classic example of horse soldier)
Factory pattern - understand Spring's Bean factory
Connect the scene of "Lao Zhang drives to the northeast" in object-oriented. Link name
Encapsulate the vehicle in "Lao Zhang drives to the northeast", encapsulate the vehicle Car
Only one car is given to the driver (single case, multiple cases)
By the way, explain the single ...
Posted by fuzz01 on Sun, 15 May 2022 07:34:12 +0300
Singleton design pattern - Enumeration singleton - singleton optimization
preface
Singleton mode is the simplest of Java design modes. You only need one class to implement singleton mode. However, you can't underestimate singleton mode. Although it is relatively simple in design, you will encounter many pits in implementation. Therefore, fasten your safety belt and get on the bus.
Definition of singleton mode
Sing ...
Posted by RestlessThoughts on Sat, 14 May 2022 16:23:00 +0300
Study Notes - Week 3
This week's Android learning summary
activity life cycle
test: Write the following code in MainActivity.java
public class MainActivity extends AppCompatActivity {
private static final String TAG = "life_cycle";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
s ...
Posted by gamerzfuse on Sat, 14 May 2022 09:20:05 +0300
Design Pattern Factory Pattern
After learning object-oriented programming, learn to create objects using keywords"new" To create objects, but creating objects in this way is a bit redundant and too coupled when a complex and multiple objects need to be created, and it is not easy to be understood. Factory pattern is used to create objects
First, the simple factory mode.
T ...
Posted by mr_badger on Fri, 13 May 2022 19:56:49 +0300
Design Patterns -- Adapter Patterns
adapter mode
Purpose: Convert the interface of a class to another interface that the client wants. The adapter pattern enables classes to work together that would otherwise not work together due to incompatible interfaces.
Hypothetical scenario: In the past, the mobile phone had a memory card, the mobile phone user put the data in the memor ...
Posted by phpnew on Fri, 13 May 2022 14:20:27 +0300
Design pattern behavioral pattern
Behavioral model
The behavior model is responsible for efficient communication and responsibility assignment between objects.
Behavioral model:
Policy pattern: encapsulates a set of algorithms into a series of objects. By passing these objects, you can flexibly change the function of the program. For example: Java util. Comparator#compare ...
Posted by gargoylemusic on Fri, 13 May 2022 12:42:04 +0300
Cloning of six objects of creative pattern -- prototype pattern
Introduction and implementation of prototype Manager
Prototype manager is a factory that stores multiple prototype objects in a collection for clients to use. It is specifically responsible for cloning objects. A collection is defined to store prototype objects. If a clone of a prototype object is needed, it can be obtained by copying the corre ...
Posted by drfate on Thu, 12 May 2022 10:52:12 +0300
python design pattern
1. Creation mode
1.1. Factory mode
1.2. Abstract factory pattern
1.3. Builder pattern
1.4. Prototype mode
2. Structural mode
2.1. Appearance mode
2.2. Decorator mode
2.3. proxy pattern
2.4. Controller mode
2.5. Sharing element mode
2.6. Adapter mode
3. Behavioral model
3.1. Observer mode
3.2. Command mode
3.3. ...
Posted by will on Thu, 12 May 2022 06:57:41 +0300
The Builder Pattern of Design Patterns
This section talks about the Builder Pattern.
In some cases, a large class needs to rely on other small classes to jointly fulfill a requirement, just as a complete mobile phone needs small parts such as CPU and screen.
The builder pattern is used to deal with this composition process, which is defined as: refers to the separation of the constr ...
Posted by dmayo2 on Thu, 12 May 2022 03:53:43 +0300
Delegation mode and policy mode of design mode
1, Delegation mode
In the delegate mode, the delegate mode is similar to the delegate mode. In the delegate mode, the delegate mode can be regarded as a result of the delegate mode.
give an example:
The Boss assigns tasks to the project manager. The project manager will distribute work tasks to each employee according to the actual situatio ...
Posted by Unseeeen on Wed, 11 May 2022 21:44:57 +0300