I have a trimmed down version of my code to illustrate the issue. Here’s the compilation error I’m getting: My code: How would you fix the code to remove the error? Thank you! Answer The fact that you have applied instanceof check in the filter() doesn’t change the type of the stream, it remains to be Stream<Object>. filter() operation is
Tag: casting
Don’t know how to create ISeq from: Java.lang.Long
Doing some practice on recursion and map implementation to knock some rust off Clojure. I’m using lists only here so how am I trying to mix seq and non-seqable stuff? REPL: Answer Some errors: replace ‘(finished-set) with finished-set into adds elements from one collection to another, I think you’re looking for conj (that’s the source of IllegalArgumentException) and if you’ll
casting of js.executeAsyncScript output to Map
I want to cast the output of below script into Map<string,string> but it is showing “java.lang.String cannot be cast to java.util.Map”error. How can we cast that in map?? Answer I assume your response is in Json format. You can use Gson to convert the String to Map.
Weird Lazy Casting Behaviour for character in Java 11
Can someone kindly explain the casting behaviour I illustrated below? Code Expected Output Actual Output As observed, when -1 is cast to char & back to short, it remembers what it was (which is -1) whereas when cast to an int it is 65535. I’d expected charo to be 65535 due to underflow upon casting to char since char only
Generic restTemplateExchange with generic responseType
I would like to create a own generic method that calls the restTemplate.exchange. In particular I would like that the signature of this generic method to be : I would differentiate what exchange method call according to “responseType” if responseType is Class< T> I call * exchange(URI url, HttpMethod method, HttpEntity<?> requestEntity, Class< T> responseType)* if responseType is ParameterizedTypeReference< T>
Parameter to pass in for type Class
I am trying to make a generic Stack class as shown but am unsure of what to put in for type when instantiating since I thought of doing however I get the following error of so I thought of using but I am unsure of what to put inside of cast() since it won’t take now I am stuck. Answer
I can’t understand casting interface to children that don’t have any parents
I am studying lambda and then WebClient Class so I am creating bean of WebClient I think top codes and bottom codes are the same I don’t understand this cast situation because HttpMessageWriter is interface and LoggingCodecSupport is class but LoggingCodecSupport doesn’t implement HttpMessageWriter, so I think HttpMessageWriter can’t cast to LoggingCodecSupport This is the code of HttpMessageWriter This is
Cast exception when trying to get the resultset in hibernate “Cannot cast ‘java.lang.Object[]’ to”
In my application im using Hibernate 3.3 for the data connection. When im trying to get the resultset by a native query, it throws Cannot cast ‘java.lang.Object[]’ to org.model.Term exception. Model class : Dao method : persistence config : table structure : When query.getSingleResult(); is evaluated the results are there. What might be causing this issue? Answer EntityManager.createNativeQuery(String sqlString) is
Enable a JButton when some component changed its border color [closed]
My goal is to enable a JButton only when some JTextFields and JComboBox change its border color from red to green. These components are included in three different JPanel. I try to create a function …
Why is this lambda expression cast using an ampersand?
recently I stumbled over the following code in the Java Comparator class: What’s confusing me is the (Comparator<T> & Serializable) part. Since the method only returns a Comparator I don’t see the use in casting to Serializable. I also don’t see the reason to ever cast anything this way, or am I missing something? It seems to me that if