I am calling a stored procedure using IN parameter – it’s working fine. Need help how to do it for OUT parameters. Answer Refer below link for how to call a stored procedure. https://dzone.com/articles/calling-stored-procedures-from-spring-data-jpa
Tag: java
Creating a Matrix with ArrayLists
I want to create an ArrayList-matrix with n-rows and m-columns, for example I’ve already written a code for creating such a matrix but my code doesn’t display the values when I clear the list containing the column-data. Here is my Is there any possibility to clear the contents of intList without c…
Spring Security – multiple logged users
I have a problem with Spring Security configuration. When I log in on one computer as a user1 and then I will log in as a user2 on another computer, the first computer after refresh sees everything as a user2. In other words, it is impossible to have two sessions with different users at the same time. Configu…
Spring: overriding one application.property from command line
I have an application.properties file with default variable values. I want to be able to change ONE of them upon running with mvn spring-boot:run. I found how to change the whole file, but I only want to change one or two of these properties. Answer You can pass in individual properties as command-line argume…
File structure listing as Json
How can I get a local directory listing as a Json? So If I provide a folder, I want to see all its subfolders and files in a json tree type object. Please note: I don’t want just the list with file paths. Thank you! Answer So @CommonsWare put me in the right direction and I was able to do
Rest Controller not recognizing GET request in Spring Boot App
I am trying to implement simple demo MVC app with Spring Boot but I get 404 error while executing the application. The uri is `http://localhost:8080/’ which is to display all the rows in a table called circle. Spring Boot : 1.3.3.RELEASE Java Version : 1.8.0_65 Database : Apache Derby 10.12.1.1 Maven Ja…
Java – Binary Tree pointer still null after initialization?
This question is very abstract and thus very hard to describe or search for, thus why I am here. It’s a very simple question however. I have the following class: What happens if I have: Notice that child is a pointer that points to either the left or the right child of root. BUT, what happens if I insta…
Method scope inside Java switch statement
In a rather loose way this question follows on from my previous one. The context here is building Android APKs with Phonegap CLI configured, via build-extras.gradle to use Java 7. Here is my code I am having some difficulty understanding two issues here As far as I can tell even without that last return I hav…
Why can’t i generate this 10×10 2D array?
I am trying to generate this 2D Array maze 10 by 10 with numbers 0-9 in each row for 10 rows, but I keep getting array out of bounds exception. I double checked my indexes and the loop format and everything looks standard. What is going on here? Why am I getting the out of bounds exception? Answer When you
logger usage, is parameterization better or using + to add arguments?
Which of the following is a better usage of logger? Parametrize (log4j 2) Using + operator (log4j) And why? Answer Even if there were nothing else, the additional StringBuilder shenanigans that happen when using + would make using parameters the obvious choice. Not to mention that when concatenating the value…