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App Inventor 2 UrsAI2UDP 拓展 - UDP广播通信协议 · App Inventor 2 中文网
...DP 地址方案，请参阅 UdpClient：地址解析/地址方案。有关 Java 中的端点，请参阅 UdpClient：地址解析/Java。
在网络上相互通信的设备称为“端点”或“主机”（它们并不完全相同，但这两个术语通常被同等使用）。因此发送者被...
Executors.newCachedThreadPool() versus Executors.newFixedThreadPool()
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Just to complete the other answers, I would like to quote Effective Java, 2nd Edition, by Joshua Bloch, chapter 10, Item 68 :
"Choosing the executor service for a particular application can be tricky. If you’re writing a small program, or a lightly loaded server, using Executors.new- Cache...
Is there a typical state machine implementation pattern?
...Stateless library exists and that blog shows a simple example with code. A Java implementation (pre Java8) is discussed. I was shown a Python example on GitHub as well.
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Is there a better way to express nested namespaces in C++ within the header
I switched from C++ to Java and C# and think the usage of namespaces/packages is much better there (well structured). Then I came back to C++ and tried to use namespaces the same way but the required syntax is horrible within the header file.
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Image Processing: Algorithm Improvement for 'Coca-Cola Can' Recognition
...eded Up Robust Features (SURF).
You can find a nice OpenCV code example in Java, C++, and Python on this page: Features2D + Homography to find a known object
Both algorithms are invariant to scaling and rotation. Since they work with features, you can also handle occlusion (as long as enough keypoin...
Strange out of memory issue while loading an image to a Bitmap object
...rs some great information for understanding and dealing with the exception java.lang.OutOfMemoryError: bitmap size exceeds VM budget when loading Bitmaps.
Read Bitmap Dimensions and Type
The BitmapFactory class provides several decoding methods (decodeByteArray(), decodeFile(), decodeResource(),...
Why does the use of 'new' cause memory leaks?
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In C# and Java, you use new to create an instance of any class and then you do not need to worry about destroying it later.
C++ also has a keyword "new" which creates an object but unlike in Java or C#, it is not the only way to creat...
What are Maven goals and phases and what is their difference?
...s phases.
Plugin is a collection of goals also called MOJO (Maven Old Java Object).
Analogy : Plugin is a class and goals are methods within the class.
Maven is based around the central concept of a Build Life Cycles. Inside each Build Life Cycles there are Build Phases, and inside each B...
SHA512 vs. Blowfish and Bcrypt [closed]
...SHA-256/SHA-512 based crypt implementation.
We ported these algorithms to Java, and you can find a freely licensed version of them at ftp://ftp.arlut.utexas.edu/java_hashes/.
Note that most modern (L)Unices support Drepper's algorithm in their /etc/shadow files.
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What is the relationship between Looper, Handler and MessageQueue in Android?
...application, and you can learn more about it in "Concurrent Programming in Java" by Doug Lea(Especially, chapter 4.1.4 "Worker Threads" would be helpful). Also, you can imagine this kind of mechanism is not unique in Android framework, but all GUI frameworks may need somewhat similar to this. You ca...