I try to deserialize a huge API payload. This payload contains way more fields than I need and therefore I am utilizing @JsonIgnoreProperties(ignoreUnknown = true). However at some point the deserialization fails with the error message: I found solutions for that case that suggested the use of I tried this. B…
Tag: java
Getting id from one json and finding name of that code in json
I am parsing data from json, like this. and json object is something like this, I am getting the coin Id, and now from that coin ID, i want to scan another json file, for that specific id, and get name or symbol from there, the other json contains, My bindviewholder method, Now my question is, how I can on
Override Hysterix Logging
I am trying to understand the logs generated by SpringBoot before and after implementing Hysterix Circuit Breaker Before Hystrix the logs looked like, After implementing Hystrix the logs looks like, So, how did http-nio-8080-exec-2 get replaced with hystrix-OrchestratorController-1, and why it’s not sho…
How to flip all the bits in Java BitSet while preserving its length
How can I flip all the bits in a Java BitSet, while preserving its length? For example, given the following BitSet: Is there a simple method to flip all the bits, while preserving the BitSet length (6, in the above example)? I would like to get: Answer BitSet has a flip(from, to) method, which allows you to f…
Howto send PUT request without content and Content-Length header with Apache http client?
I’d like to test (via automated test) how server (and all proxies in-the-middle) responds to a PUT request without body and Content-Length header. Similar to what curl does with Apache HTTP client (4.5.13) But it looks like it always adds Content-Length header if I specify no body. Is there any way to d…
How can I add a scroll bar to a text area?
Please, anyone, tell me how to add the scrollbar to a JTextArea. I tried out many things. but still not able to get it. I copied some codes related to the text area. Answer Oracle has a helpful tutorial, Creating a GUI With Swing. Skip the Netbeans section. As Andrew said, you have to place the JTextArea insi…
I have a HashSet pre. Is there a fast way to do HashSet PreIDs = for each x do x.getID in Pre? (in Java)
There is a class Prerequisite, it has a method getID(). Instead of doing is there a more efficient or more concise way to call a method over a HashSet? Answer As @ernest_k said, there isn’t any more efficient way in my opinion too. But we can write that whole logic in one line as below (if you are using…
MobileElement not exist in java-client 8.0.0
I can’t find a way to import MobileElement for code I copy after following this guide: https://www.youtube.com/watch?v=i1tQ1pjEFWw&t=1915s&ab_channel=edureka%21 in Appium for testing Android. But the recorded code has MobileElement, so I do the same by downloading libraries from this site: http:…
Developing multiple springboot services in an IDE
How can you develop and test multiple REST services developed in Springboot from an IDE? I will have to have different port numbers for each REST service, is there any better way? Answer First of all you’ll probably want to show all the source files from all the services in the same IntelliJ project. So…
Correct syntax for making a functional interface instance automatically call its method
I’ve been watching Douglas Schmidt classes on Parallel Java. He introduces Lambda x method referencing syntax discussion, highlighting how the last one is preferable, as it makes clearer what the code is actually doing, not what the programmer is trying to do with the code, even more than forEach approa…