I am using Spring Boot to implement two web services, User and Book, and I am implementing the POST methods. When I send a POST request, i include the hard-coded JSON object in the HTTP Body: I am working at the same time on the two services, and while the creation of the “user” object works fine, Jackson throws an
paintComponent() not being called
Here is a little program that should (in theory) draw an image of a ball on screen. The problem is that paintComponent seems to not get called. The program consists of two classes. As you can see, I tested if paintComponent was called using a console message. Sadly this was not the case. Can someone explain? Answer It’s no wonder
Nested generic types in static method
I was trying to develop a generic method that could convert a JSON to a generic object that would have another instantiable generic object inside so I could use it as a parser in several places in my application. I had thought of the following solution, but it doesn’t work: Is there any way to be able to perform such
Error parsing SQL Mapper Configuration in mybatis
I am using mybatis framework in a servlet and the mybatis-config.xml file is unable to find the Student_mapper class.I applied all the paths including the package name and excluding it and also used the element in my mybatis-config.xml but it doesn’t work.I am still getting the same error. Here’s my mybatis-config.xml file Here’s my Student_mapper interface Answer The mapper class
Multiple RestTemplate calls for each Id in a List
I need to make multiple RestTemplate calls for each of the Id in a List<Ids>. What is the best way to perform this? I have used parallelStream(). Below code snippet is a similar scenario. employeeService.fetchEmployeedetails is a kind of restCall which will fetch all the employeeDetails. Is there any other way to tune the performance? Answer .parallelStream() does not guarantee
SLF4J/Java logging: Is it possible to add log arguments automatically?
Introduction We’re using SLF4J in combination with Logback in several Spring (Boot) applications and recently started using the logstash-logback-encoder to implement structured logging. As we also still have to support plain text logs, we wondered whether it was possible to append arguments automatically to log messages without having to add them manually to the message using the {} markers. Example
If a spring singleton bean has a dependency to another bean, will they be destroyed in the reverse order they were created in?
This is a question about the default behavior of Spring. Say I have a singleton bean called BeanA, which has a constructor dependency to a singleton bean called BeanB. BeanB will have to be created before BeanA in order to satisfy that dependency. If both beans implement the DisposableBean interface I would expect the destroy method to be called in
Android java : Error on SQLiteDatabase db = this.getWritableDatabase();
Am a beginner at android java. Error on SQLiteDatabase db = this.getWritableDatabase(); line in ERROR : I already had called the getWritabledatabase in the insert function. But when I try to write again. It doesn’t work. Answer You need to pass a valid Context to your SQLiteOpenHelper constructor.
Why spring-boot-starter-data-jpa 2.5.0 can not init data by the cause “table not found”?
I have 2 projects using the same H2 configurations: The first project used spring-boot-starter-data-jpa 1.5.8.RELEASE which can init data successfully. But the second one used spring-boot-starter-data-jpa 2.5.0 CAN NOT init data: Trace the log I have seen that the init data sql is run before the db structure generated. Spring team! Please help to fix this issue to save time
How to pass input to multi element text box which is varying dynamically using selenium with java
I have one page where it has single text box, same page we have link called “create account”. When I click “create account”, page will be added with one more text box(i.e now text box count go to 2, next click 3 text box, next click 4 text box, etc). So whenever we click “create account” text box will be