I’ve found the following code online but don’t know how to run it on IDE as I’m new to Java could you please help. I tried creating a class and copy-pasting the code but couldn’t manage to produce any output. Super stuck and am still a novice. Doing it by hand I think it should output …
Tag: java-8
stop other service calls if using Completable future to call multiple services if any of service fails
I am using completable future to invoke multiple service calls. And then I am using : Well why am i using this kind of code ??? by doing that I am able to improve performance. If service1 succeeds with 200 & takes 3 sec of time , service2 succeeds with 200 & takes 3 sec of time , service3 succeeds
Java 8 stream string manipulation and comparison [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 1 year ago. Improve this question In Java 8, can I use streams to manipulate, filter and compare string? I know how to do in ja…
count non-null numbers of an object
I am making a method that can count non null value of an object, but I have an object inside another object and I have to confirm if that object is empty too, I tried with isEmpty, isNull but it says it is not empty. Object Validation method I have also tried with !ObjectUtils.isNull… Even though the &#…
Convert iterative method to functional with Java 8 Streams
I have this algorithm right here, that gives me the cubic root of n with a loss precision of e. I need to do the same thing but using Java 8 Streams. Math2 is from a private git rep. You can use Math.pow instead; it will work too. How can I do the same algorithm with Streams? Answer Java Stream
How to force java SSLContext to use TLSv1.1
How do I get a jersey client to use TLSv1.1? I’m trying to force a com.sun.jersey.client.urlconnection.HTTPSProperties (jersey client code eventually goes to this class) to use TLSv1.1 (or TLSv1) to write test code that confirms a server’s protocols. As I setup the client, I do the following: Insi…
Finding the duplicate values and the number of occurrences of the same in Java Map
I am using Java. I have a Map as shown below : I am inserting Map objects with some key value pairs into the above List<Map<String, String>> listMap. Now, I want to iterate and then find if there are any duplicate/same values for the key jobDescription in any of the map, then check for the value o…
argument mismatch; invalid functional descriptor for lambda expression
I am using the jdbi library like so: This try catch pattern is repeated a few times, with various different queries passed to the jdbi.withHandle method. Another example: The jdbi.withHandle method has this signature: I am trying to find a way to reduce the duplication around the try-catch, so that I can use …
Using Stream API to count stats
I have following model representing a Snack bar SnackBarStat – This has a start date for a booking, number of customers in booking and number of Days(customer can set a start date and say for how many days they want to have table) Now given a list of such stats I am trying to find for each date how many
Why does calling CompletableFuture::cancel cause an immediate CancellationException
I am trying to call cancel on CompletableFuture. It seems from the docs: If not already completed, completes this CompletableFuture with a CancellationException. Dependent CompletableFutures that have not already completed will also complete exceptionally, with a CompletionException caused by this Cancellatio…