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Should I instantiate instance variables on declaration or in the constructor?
... of any method, so they cannot be executed as statements are. Instead, the Java compiler generates instance-field initialization code automatically and puts it in the constructor or constructors for the class. The initialization code is inserted into a constructor in the order it appears in the sour...
Semantic Diff Utilities [closed]
...d "Structure Compare", and it's very nice. Here is a sample screenshot for Java, followed by another for an XML file:
(Note the minus and plus icons on methods in the upper pane.)
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How do I get IntelliJ IDEA to display directories?
I've been trying out IntelliJ IDEA for JavaScript editing, and I like it so far, but I'm having a small problem with a new project.
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What is Turing Complete?
...n run, then it's Turing complete.
Most modern programming languages (e.g. Java, JavaScript, Perl, etc.) are all Turing complete because they each implement all the features required to run programs like addition, multiplication, if-else condition, return statements, ways to store/retrieve/erase dat...
Compiled vs. Interpreted Languages
...be compiled again at a later stage to get native code (e.g. as done by the Java JVM JIT compiler).
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Testing two JSON objects for equality ignoring child order in Java
I'm looking for a JSON parsing library that supports comparing two JSON objects ignoring child order, specifically for unit testing JSON returning from a web service.
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How are everyday machines programmed?
...s the 100 pound gorilla) that boot an embedded version of Linux and/or the Java JVM.
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Replacing all non-alphanumeric characters with empty strings
...); you don't need the "/" inside the regexp, I think you've confused with javascript patterns
– eriknyk
May 1 at 21:06
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Uses for Optional
Having been using Java 8 now for 6+ months or so, I'm pretty happy with the new API changes. One area I'm still not confident in is when to use Optional . I seem to swing between wanting to use it everywhere something may be null , and nowhere at all.
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When does System.gc() do something?
I know that garbage collection is automated in Java. But I understood that if you call System.gc() in your code that the JVM may or may not decide to perform garbage collection at that point. How does this work precisely? On what basis/parameters exactly does the JVM decide to do (or not do) a GC ...