I am trying to iterate the rows from TableResult using getValues() as below. if I use getValues(), it’s retrieving only the first page rows. I want to iterate all the rows using getValues() and NOT using iterateAll(). In the below code, the problem is its going infinite time. not ending. while(results.h…
Tag: java
JTable multiple selection on Mac OS X
I have a Swing application and we are having a problem with some Mac users and JTable components. The tables have this selection mode set: On Windows with this selected you can: select a single row select contiguous rows by holding the mouse and dragging select contiguous rows by clicking the first row to sel…
What is the correct way of doing Java IPC through /dev/shm (with the lowest possible latency)
I’m trying to code an IPC solution through /dev/shm. @SK-logic gave me some pointers in the comments here: Chronicle: How to optimize memory-mapped files for low-latency? My doubt is: Should I use a MappedByteBuffer or just a plain FileChannel? With a MappedByteBuffer I can use sun.misc.Unsafe and have …
Mac The operation couldn’t be completed. Unable to locate a Java Runtime that supports jarsigner
My purpose is to use jarsigner to sign apk. I get the following prompt： my java version hint： Mac version is 11.6.3 How can I solve this problem please? Answer I finally solved it by downloading the JDK
java cannot find symbol class Generated
Hello guys my problem is I generate QClasses with querydsl everything generate nice but if I want run project build failed because cant find symbol. Before that it worked well and suddenly without changing the pom.xml so it not work. I’ve had this problem before, and if I remember correctly, I fixed it …
NullPointerException Mock when use RestTemplate
I am new to using mockito and I have a problem. I wrote a controller test and it uses restTemplate to get data from another api, but when I run the test, the variable of this type is null. In result NullPointerException. What could be the problem? Controlle: Test: Answer This is because you don’t have r…
Using Set instead of List cause “Could not write JSON: Infinite recursion” exception
I was getting the error “Could not write JSON: Infinite recursion” when trying to access the endpoint http://localhost:8080/categoryOfPermissions. I’ve researched and found various solutions here (@JsonManagedReference / @JsonBackReference, @JsonIgnore, @JsonIdentityInfo), but none of them s…
How to replace deprecated SeekToCurrentErrorHandler with DefaultErrorHandler (spring-kafka)?
I am trying to find a way to use the new DefaultErrorHandler instead of deprecated SeekToCurrentErrorHandler in spring-kafka 2.8.1, in order to override the retry default behavior in case of errors. I want to “stop” the retry process, so if an error occurs, no retry should be done. Now I have, in …
Java – HashMap for booking system
I have been given an exercise to develop an appropriate data structure to implement a tennis court booking system. A hashmap is what is required for this and I was given a diagram as a visual representation of the data structure. From looking at the diagram, I am unclear on how the Key and Value should be def…
Spring Boot Actuator – Get your own /info data
Is there a way to get your own /info response from the service? I am having one service that is exposed to frontend and I would like to aggregate /info responses from all of the internal services, and also add my own. However, the only option to get my own data is to call myself … And I would like