05 2011 檔案
摘要: The Java community is now swamped with discussions about Oracle's patent suit against Google's Android platform. I've been contributing my opinion in several places, but there is one critical topic that needs repeating the same comments everywhere... so, this blog spills the beans once and completely.
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摘要: Activities in the system are managed as an activity stack. When a new activity is started, it is placed on the top of the stack and becomes the running activity -- the previous activity always remains below it in the stack, and will not come to the foreground again until the new activity exits.
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摘要: The one question I get more than any other is "How does Google test?" It's been explained in bits and pieces on this blog but the explanation is due an update
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摘要: Dependency injection asks us to separate the new operators from the application logic. This separation forces your code to have factories which are responsible for wiring your application together. However, better than writing factories, we want to use automatic dependency injection such as GUICE to do the wiring for us. But can DI really save us from all of the new operators?
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摘要: Everyone seems to think that they are writing OO after all they are using OO languages such as Java, Python or Ruby. But if you exam the code it is often procedural in nature
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摘要: 靜態(tài)分派（Static Dispatch），發(fā)生在編譯時期，分派是根據(jù)靜態(tài)類型信息發(fā)生的，方法重載就是靜態(tài)分派。
動態(tài)分派（Dynamic Dispatch），發(fā)生在運行時期，動態(tài)分派動態(tài)地置換掉某個方法。面向?qū)ο蟮恼Z言用動態(tài)分派實現(xiàn)多態(tài)性。
Java語言支持靜態(tài)多分派和動態(tài)的單分派，復(fù)用設(shè)計模式Java可以實現(xiàn)Double Dispatch，即訪問者模式。
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摘要: 要設(shè)計良好的架構(gòu)，必須做到關(guān)注點分離，這樣可以產(chǎn)生高內(nèi)聚、低耦合的系統(tǒng)，這是美麗架構(gòu)的終極原則
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摘要: A synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point. CyclicBarriers are useful in programs involving a fixed sized party of threads that must occasionally wait for each other. The barrier is called cyclic because it can be re-used after the waiting threads are released.
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摘要: A java.util.concurrent.CountDownLatch is a concurrency construct that allows one or more threads to wait for a given set of operations to complete
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