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Java8 variable in for loop

By : Lajos Kovács
Date : September 17 2020, 02:00 AM
Hope that helps You can use the generated Stream using IntStream and process the numbers in the same way. Note that Math::pow returns Double therefore the pipeline results in DoubleStream.
code :
IntStream.range(0, n).mapToDouble(i -> b * Math.pow(2, i)).reduce(Double::sum);
IntStream.range(0, n).mapToDouble(i -> b * Math.pow(2, i)).reduce((left, right) -> {
    double s = left + right;
    return s;

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Sbt Publish Java8 Project to Sonatype - JavaDoc Failure on Java8 Features

By : user195648
Date : March 29 2020, 07:55 AM
Hope that helps The first two warnings emerge from the Javadoc linting that has been added in Java 8. You can either document your type parameters or disable linting using -Xdoclint:none.
The last four warnings are caused by your < and > that the Javadoc tool treats as HTML tags, you'll need to escape them using < for < and > for >.

Adding java8 tag to a rule does not prevent it to be played on non-java8 code

By : Θανασης Χατζοπουλος
Date : March 29 2020, 07:55 AM
To fix this issue This is not a False positive, this is simply not the way the analyzer is working.
Let me explain: Only a few rules from the SonarJava analyzers are explicitly targeting java 8 source code (and usually following versions). Around 20 for SonarJava 4.15. These rules are explicitly tagged with the java8 tag, but they are also implemented in a way they will react depending on the source version. This tag mechansim goes only one way:

Converting a old loop in a Java8 loop

By : user2134320
Date : March 29 2020, 07:55 AM
Any of those help I am completely new in Java8, I have this piece of code , In your first solution, you are missing the collect(toList()):
code :
List<CompletableFuture<MainIngredient>> priceFutureList = resto1.getMenu().stream()
            .map(menu -> CompletableFuture.supplyAsync(() -> MainIngredient.getMainIngredient(menu.getName()), executorService))

How to use the variable inside the foreach loop in Java8?

By : Alaxe
Date : March 29 2020, 07:55 AM
Hope that helps As usual, when you decide to go functional, you must step back to a higher-level description of what you are aiming for, and then rewrite your code in FP style.
You want to determine the total count for three categories of events: "present", "absent", and "nottaken". Here is a suggestion on how to achieve it the FP-way (thanks to Stuart Marks for pointing out how to construct a library-provided frequency-counting collector):

For loop optimisation with Java8

By : كرار رشيد ابا يقين
Date : March 29 2020, 07:55 AM
around this issue How do achieve this with one line ? , Since the IDs are unique, you can do it like
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