Dear student, in many Java Interviews your ll be ask talk for SOLID Principles, today we ll talk about S. S represents the Single Responsibility principle O represents the Open Closed principle L represents the Liskov Substitution principle I represe...
When we design using spring or springboot we use annotations like @service @component @repository, etc. to notice spring that these are component we ll want handled by spring. Is possible that other classes, that shows not so importants in one "first...
It is good programming practice, avoid null checking of a value, instead of using if (someObject! = Null), you can use Optional, it can be used as follows: Optional oR = Optional.of (Optional.ofNullable (yourOriginalInstanceToUse) .orElse (YourInsta...
When You use Swagger (3.0), by default, Swagger shows all Apis more than you developed (example error Api) To resolve it, in your Swagger config Bean you can select only the packages that contains the controllers that you want to show: In the exaple ...
