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java-8

How to specify function types for void (not Void) methods in Java8?

by IT Nursery

I’m playing around with Java 8 to find out how functions as first class citizens. I have the following snippet: package test; import … Read more

Tags java, java-8

What are functional interfaces used for in Java 8?

by IT Nursery

I came across a new term in Java 8: “functional interface”. I could only find one use of it while working with lambda … Read more

Tags functional-interface, java, java-8, lambda

In Java 8 how do I transform a Map to another Map using a lambda?

by IT Nursery

I’ve just started looking at Java 8 and to try out lambdas I thought I’d try to rewrite a very simple thing I … Read more

Tags java, java-8, java-stream, lambda, map

Class has been compiled by a more recent version of the Java Environment

by IT Nursery

While running Selenium script, I am getting the following error message in the Eclipse console: Class has been compiled by a more recent … Read more

Tags eclipse, firefox, java, java-8, selenium

Should I return a Collection or a Stream?

by IT Nursery

Suppose I have a method that returns a read-only view into a member list: class Team { private List<Player> players = new ArrayList<>(); … Read more

Tags collections, encapsulation, java, java-8, java-stream

Can you split a stream into two streams?

by IT Nursery

I have a data set represented by a Java 8 stream: Stream<T> stream = …; I can see how to filter it to … Read more

Tags java, java-8, java-stream

Intellij – Unable to use newer Java 8 classes – Error : “Usage of API documented as @since 1.6+..”

by IT Nursery

I’m trying to use a java.lang.function.Function in my java 8 code base, but i keep getting the following error in Intellij. Usage of … Read more

Tags intellij-idea, java-8

In Java, what are the advantages of streams over loops? [closed]

by IT Nursery

Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so … Read more

Tags java, java-8, java-stream, loops

What’s the difference between ZonedDateTime and OffsetDateTime?

by IT Nursery

I’ve read the documentation, but I still can’t get when I should use one or the other: OffsetDateTime ZonedDateTime According to documentation OffsetDateTime … Read more

Tags java, java-8, java-time

In Java streams is peek really only for debugging?

by IT Nursery

I’m reading up about Java streams and discovering new things as I go along. One of the new things I found was the … Read more

Tags java, java-8, java-stream, peek
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