Cannot resolve symbol ‘NotEmpty’
I’m starting to study JavaSpring and I want to validate the attributes of my class.
I’m using this annotation: @NotEmpty to validate the fields.
java.lang.NoClassDefFoundError: org/springframework/util/ConcurrentReferenceHashMap$EntrySet
Try running the gradle jettyrun command, however it always fails with the error shown below.
Java failed to build .jar with Spring Boot
I try to build .jar with Spring Boot for Java8.
But,I get this message.