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What is the difference between a.getClass() and A.class in Java?
...xist surrounding the choice to use a.getClass() or A.class ? Either can be used wherever a Class<?> is expected, but I imagine that there would be performance or other subtle benefits to using both in different circumstances (just like there are with Class.forName() and ClassLoader.loa...
What is a stream?
What is a stream in the programming world? Why do we need it?
6 Answers
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In which case do you use the JPA @JoinTable annotation?
...ribute. In fact, recent versions of Hibernate refuse to start up by printing the following error:
org.hibernate.AnnotationException:
Associations marked as mappedBy must not define database mappings
like @JoinTable or @JoinColumn
Let's pretend that you have an entity named Project and a...
Rename a git submodule
Is there some easy way to rename a git submodule directory (other than going through the entire motion of deleting it and re-adding it with a new destination name).
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What algorithm gives suggestions in a spell checker?
What algorithm is typically used when implementing a spell checker that is accompanied with word suggestions?
5 Answers
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Difference between HashMap, LinkedHashMap and TreeMap
What is the difference between HashMap , LinkedHashMap and TreeMap in Java?
I don't see any difference in the output as all the three has keySet and values . What are Hashtable s?
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Can grep show only words that match search pattern?
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edited Feb 5 '16 at 7:43
Stefan van den Akker
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Why are interface variables static and final by default?
Why are interface variables static and final by default in Java?
15 Answers
15
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In Java, are enum types inside a class static?
I can't seem to access instance members of the surrounding class from inside an enum, as I could from inside an inner class. Does that mean enums are static? Is there any access to the scope of the surrounding class's instance, or do I have to pass the instance into the enum's method where I need it...
Android global variable
How can I create global variable keep remain values around the life cycle of the application regardless which activity running.
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