java

Java sealed class illegal subclass

IllegalCallerException.*sealed.*permits

Fixes

1.Add the subclass to the 'permits' clause of the sealed class
2.Ensure subclass is in the same module or package as sealed parent
3.Mark the subclass as final, sealed, or non-sealed

java-21sealed-classes

Related Errors

Spring Boot bean not found in application context

NoSuchBeanDefinitionException.*No qualifying bean of type

•Add @Component/@Service/@Repository annotation to the class
•Ensure the package is scanned: check @ComponentScan or @SpringBootApplication basePackages

Spring circular dependency during bean creation

BeanCurrentlyInCreationException.*Requested bean is currently in creation

•Use @Lazy annotation on one of the circular dependencies
•Refactor to break the circular dependency with an event or interface

Spring Boot unsatisfied dependency injection

UnsatisfiedDependencyException.*Error creating bean with name

•Verify the required bean exists and is properly annotated
•Use @Qualifier to disambiguate when multiple beans of same type exist