In the java manual it says that it is recommended to use try-finally when using lock() and unlock(), but this is also necessary when an exception is never thrown in the try block? for example: Answer Adding it always is a reasonable advice: For a beginner, because they may not be aware of all the ways excepti…
Tag: java
Cannot resolve symbol, but the dependency is in local repo
I’ve been reading all similar problems with maven but I cannot seem to be able to fix it. The issue is the classic “Cannot resolve symbol ‘pippo’”, in which case pippo is part of import com.pippo.device.manager.data.model.Device; This class Device comes from this artifact that I have i…
Access Redis connection pool using Spring Data Redis without Reflection API
Please help me here with the solution. I want to monitor and periodically log information about the Redis Connection Pool usage in my application. I am using use Redis via spring-data-redis RedisTemplate object. I know that we can access pool through Reflection API as below. Since the pool is accessing throug…
How to Get data from nested LinkedHashMap
How to get the “test” data from this linkedHashMap response.get(“url”) = null response.get(“data.images.original.url”) = null response.get(“data”).get(“images”).get(“original”).get(“url”) toString(); result{data={images={origi…
For some reason my Android room DAO insert doesn’t work on Temi Robot
For some reason even after following some parts of the guide, I wasn’t able to insert a new entry to my database. retrival is okay. I don’t really want to do the respitory and viewmodel boilerplates as mentioned in the guide I have put the relevant dependencies in build.gradle already. I am using …
How can i solve [Received fatal alert: bad_certificate]?
I’ve created two servers locally, and I’m going to apply a mutual authentication to their communication. I just don’t know what the problem is. I lack understanding of this mechanism, but I also lack understanding of the server itself. Create each key store Export to X.509 to register certif…
How to thread-safe update loadingcache value guava map
For the test, in the addCache method, I created and added a map. The card has a key “a” and a value “1111”. And key “b” for LoadingCache. Next, I want to update the value “1111” to the value “2222”. To do this, I pass all the necessary parameters fro…
https proxy using okhttp3
I am using okhttp3 and trying to see how do I pass userId & pswd to authenticate with proxy server that accepts only HTTPS protocol. I already saw exmaple over SO & on other sites(link below) but they don’t have HTTPS protocol. https://botproxy.net/docs/how-to/okhttpclient-proxy-authentication-h…
Different @JsonProperty config for READ and WRITE on same field?
I have a class (which cannot be modified) like When deserializing I get data like: As I cannot modify the Standing class I have a mix-in like: As the received json does not have positionNumber and positionText fields I use the @JsonPropery annotations. With Access.READ_ONLY I simply ignore the positionNumber …
Tic Tac Toe runs and functions completely, but after getting 3 in a row, another move has to be made for it to end [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 1 year ago. Improve this question Is anyone of you able to find out why it loops around 1 extra time even tho…