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How convert JavaRDD to JavaRDD<List>?

I try make it with use this code, but I get WrappedArray How make it correctly? Answer You can use getList method: where lemmas is the name of the column with lemmatized text. If there is only one column (it looks like this is the case) you can skip select. If you know the index of the column you can

ConfigurationProperties does not bind properties

I want to bind my application.properties into a class automatically by using @ConfigurationProperties annotation. First, I tried with @Value annotation and was able to inject property values into class variables. However, @ConfigurationProperties did not inject properties into values. my application.propertie…

How to return a set of objects with Spring Boot?

I did a lesson about Spring Boot and it works perfectly. But what if I want to return a set of objects ? I tried doing this but it doesn’t work. How can I do it correctly ? With one object (it works): With many objects (it doesn’t work): Answer If you compare your original method to your newly mad…

How would I get only IPv4 addresses

I have the following code which is supposed to get only the IPv4 addresses of all active interfaces, but it still returns an IPv6 address on some computers. I’ve tried to specify using only IPv4 by using System.setProperty(“java.net.preferIPv4Stack” , “true”);, but this only caus…

Radiobutton display problems with PDFBox

I used the code from the answer from this question to create my radiobuttons: How to Create a Radio Button Group with PDFBox 2.0 After I created my PDF and tried to read the (programatically) selected value from it, this code worked fine: When I open the PDF in Acrobat Reader DC, make changes and save it agai…