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Safely casting long to int in Java

What's the most idiomatic way in Java to verify that a cast from long to int does not lose any information? 10 Answers ...
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Pros and cons of Java rules engines [closed]

What are the pros and cons to adopting the Java rules engines JESS and Drools ? Are there any other players? 5 Answers ...
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Big-O summary for Java Collections Framework implementations? [closed]

I may be teaching a "Java crash-course" soon. While it is probably safe to assume that the audience members will know Big-O notation, it is probably not safe to assume that they will know what the order of the various operations on various collection implementations is. ...
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What is an uber jar?

... And so on. (a) I probably shouldn't have to explain what a JAR is to a Java developer but I'll include it for completeness. It's a Java archive, basically a single file that typically contains a number of Java class files along with associated metadata and resources. ...
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Example images for code and mark-up Q&As [closed]

... existing answers on SO. Icons Simple Geometric shapes generated using Java as originally seen in this answer. It includes a Java based interface that defines the URLs and makes them easy to access. Details: 32x32 pixel PNG (4 colors x 5 shapes) with partial transparency (along the edges). Ca...
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What is the difference between ? and Object in Java generics?

I'm using Eclipse to help me clean up some code to use Java generics properly. Most of the time it's doing an excellent job of inferring types, but there are some cases where the inferred type has to be as generic as possible: Object. But Eclipse seems to be giving me an option to choose between a...
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What is the purpose of flush() in Java streams?

In Java, flush() method is used in streams. But I don't understand what are all the purpose of using this method? 6 Answe...
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What is the default access specifier in Java?

I just started reading a Java book and wondered; which access specifier is the default one, if none is specified? 12 Answer...
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Efficiency of Java “Double Brace Initialization”?

In Hidden Features of Java the top answer mentions Double Brace Initialization , with a very enticing syntax: 15 Answe...
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is there a Java equivalent to null coalescing operator (??) in C#? [duplicate]

Is it possible to do something similar to the following code in Java 6 Answers 6 ...