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What is the difference between an interface and abstract class?
...ometimes untrue. Sometimes, they are not even what you think they are.
In Java, this rule is strongly enforced, while in PHP, interfaces are abstract classes with no method declared.
In Python, abstract classes are more a programming trick you can get from the ABC module and is actually using meta...
How can I use grep to find a word inside a folder?
...rent directory)
grep -nr 'MobileAppSer*' . (Would find MobileAppServlet.java or MobileAppServlet.class or MobileAppServlet.txt; 'MobileAppASer*.*' is another way to do the same thing.)
To check more parameters use man grep command.
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What does “atomic” mean in programming?
In the Effective Java book, it states:
6 Answers
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How to convert comma-separated String to List?
Is there any built-in method in Java which allows us to convert comma separated String to some container (e.g array, List or Vector)? Or do I need to write custom code for that?
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HashMap get/put complexity
...s to the same bucket, thus O(N) if each bucket is backed by a List.
since Java 8, HashMap dynamically replaces the Nodes (linked list) used in each bucket with TreeNodes (red-black tree when a list gets bigger than 8 elements) resulting to a worst performance of O(logN).
But, this in NOT the full...
JavaScript editor within Eclipse [closed]
I'm looking for the best JavaScript editor available as an Eclipse plugin. I've been using Spket which is good. But, is there more better one?
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How to start new activity on button click
...more codemissing than code actually typed. Where is all xml interface and .java code missing? Downvote
– Liquid Core
Jun 21 '15 at 12:50
117
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Why must wait() always be in synchronized block
...ronization primitives at all and work with the abstractions offered in the java.util.concurrent packages.
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How to insert in XSLT
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The link Top Ten Java and XSLT Tips is really useful.
– LCJ
Feb 5 '16 at 16:41
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Inner class within Interface
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Yes, you can create both a nested class or an inner class inside a Java interface (note that contrarily to popular belief there's no such thing as an "static inner class": this simply makes no sense, there's nothing "inner" and no "outter" class when a nested class is static, so it cannot be...