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Java 8 List into Map
I want to translate a List of objects into a Map using Java 8's streams and lambdas.
21 Answers
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Java: convert List to a String
JavaScript has Array.join()
22 Answers
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Use of “instanceof” in Java [duplicate]
I learned that Java has the instanceof operator. Can you elaborate where it is used and what are its advantages?
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Why can't I declare static methods in an interface?
...tions: you don't know which implementing class is the correct definition.
Java could allow the latter; and in fact, starting in Java 8, it does!
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Split Java String by New Line
...gex, limit) with negative limit like text.split("\\r?\\n", -1). More info: Java String split removed empty values
– Pshemo
Jul 19 '16 at 13:08
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Intersection and union of ArrayLists in Java
... This post could use an update to demonstrate the benefits of the Java 8 Stream API.
– SME_Dev
Sep 2 '15 at 15:57
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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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