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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

Java: FasterXML / jackson deserialize array without keys

Is there a way how to deserialize JSON array into following Java class using FasterXML jackson-databind? I only found answers where there are key: value items in the array. Answer Firstly {[“a”, “b”, 1]} is not a Valid Json Array (or JSON) …. JSON Array would look like this [“a”, “b”, 1] Also you could deserialize the Json Array into

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.properties: application.java ConfigBinder.java output: What is the wrong with this implementation? edit and solution: possible duplication: Spring Boot @ConfigurationProperties not retrieving

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 made

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 causes getIpAddress() to return an empty list. How should I be getting the IPv4 of active interfaces

Regex Pattern with Unicode doesn’t do case folding

In C# it appears that Grüsse and Grüße are considered equal in most circumstances as is explained by this nice webpage. I’m trying to find a similar behavior in Java – obviously not in java.lang.String. I thought I was in luck with java.regex.Pattern in combination with Pattern.UNICODE_CASE. The Javadoc says: UNICODE_CASE enables Unicode-aware case folding. When this flag is specified

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 again the code

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