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How do servlets work? Instantiation, sessions, shared variables and multithreading
...ets and filters are shared among all requests. That's the nice thing about Java, it's multithreaded and different threads (read: HTTP requests) can make use of the same instance. It would otherwise be too expensive to recreate, init() and destroy() them for every single request.
You should also rea...
Difference between “@id/” and “@+id/” in Android
...us symbol + instructs to create a new resource name and add in to the R.java file but what about @id/ ? From the documentation of ID : when referencing an Android resource ID , you do not need the plus symbol, but must add the android package namespace, like so:
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@RequestParam vs @PathVariable
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@AlexO: this has nothing to do with java8, it works even for java 5 and Spring3.0: The point is that the code is compiled with debugging enabled.
– Ralph
Oct 23 '16 at 8:18
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What is the difference between @Inject and @Autowired in Spring Framework? Which one to use under wh
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Assuming here you're referring to the javax.inject.Inject annotation. @Inject is part of the Java CDI (Contexts and Dependency Injection) standard introduced in Java EE 6 (JSR-299), read more. Spring has chosen to support using the @Inject annotation synonymously...
What does “hashable” mean in Python?
...l always get the same result with the same version of Python.
But hash(‘Java’) returns 1753925553814008565. So if the object I am hashing changes, so does the result. On the other hand, if the object I am hashing does not change, then the result stays the same.
Why does this matter?
Well, Pyt...
Naming Classes - How to avoid calling everything a “Manager”? [closed]
... copy the names already in the .NET framework, and I look for ideas in the Java and Android frameworks.
It seems Helper, Manager, and Util are the unavoidable nouns you attach for coordinating classes that contain no state and are generally procedural and static. An alternative is Coordinator.
You...
“Comparison method violates its general contract!”
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Introduced in Java 7's java.util.Arrays.sort stackoverflow.com/questions/7849539/…
– leonbloy
Jun 22 '16 at 17:28
46
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What is the reason behind “non-static method cannot be referenced from a static context”? [duplicate
...y start with an exception to the rule?) That's very counter-pedagogical of Java, that the "first" thing you should learn is the public static void main thing. (Few real Java applications have their own main methods anyways.)
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list.clear() vs list = new ArrayList(); [duplicate]
... might be faster to make a new ArrayList.
http://www.docjar.com/html/api/java/util/ArrayList.java.html
public void clear() {
modCount++;
// Let gc do its work
for (int i = 0; i < size; i++)
elementData[i] = null;
size = 0;
}
...
How can I make my custom objects Parcelable?
...ee my warnings.
Hrisey
Warning!
Hrisey has a known issue with Java 8 and therefore cannot be used for Android development nowadays.
See #1 Cannot find symbol errors (JDK 8).
Hrisey is based on Lombok. Parcelable class using Hrisey:
@hrisey.Parcelable
public final class POJOClass im...