• PROMOTION: @Wither has been promoted to the main package, renamed to @With. Otherwise, no changes have been made to the annotation. The old experimental annotation will remain for a few versions as a deprecated annotation. If you had lombok.config configuration for this annotation, the configuration keys for this feature have been renamed.
• FEATURE: You can now configure a custom logger framework using the new @CustomLog annotation in combination with the lombok.log.custom.declaration configuration key. See the log documentation for more information. Pullrequest #2086 with thanks to Adam Juraszek.
• ENHANCEMENT: Thanks to Mark Haynes, the staticConstructor will now also be generated if a (private) constructor already exists.
• ENHANCEMENT: val is now capable of decoding the type of convoluted expressions (particularly if the right hand side involves lambdas and conditional (ternary) expressions). Pull Request #2109 with thanks to Alexander Bulgakov.
• ENHANCEMENT: You can now configure the generated builder class name via the config system, using key lombok.builder.className. See the Builder documentation and SuperBuilder documentation
• ENHANCEMENT: If you mix up eclipse's non-null support, such as @NonNullByDefault, with lombok's @NonNull, you get a bunch of warnings about dead code that are inappropriate. These warnings are now suppressed, thanks to a contribution from Till Brychcy! Pull Request #2155
• ENHANCEMENT: @NonNull can now also generate checks using jdk's Objects.requireNonNull or Guava's Preconditions.checkNotNull.
• EXPERIMENT: Lombok is working together with checkerframework to enable detection of improper builder use (such as forgetting to set a mandatory property prior to calling build()). This experiment can be turned on by adding checkerframework = true to your lombok.config file.
• BUGFIX: Using @JsonProperty or @JsonValue on a field in combination with @Setter or @Data would sometimes throw a ClassCastException during compilation.
• BUGFIX: Delombok would turn something like List<byte[]>... in a method parameter to List<byte...>...
• BUGFIX: Javac would generate the wrong equals and hashCode if a type-use annotation was put on an array type field
• BUGFIX: Eclipse 2019-06 + JDK-12 compatibility + an @Singular builder entry would produce a cascade of error dialogs.
• BUGFIX: Javac would throw a NullPointerException if the package-info.java did not contain a package declaration.
• BUGFIX: Javac sets incorrect annotated type on constructor, getter and setter.
• IMPROBABLE BREAKING CHANGE: Stricter validation of configuration keys dealing with identifiers and types (lombok.log.fieldName, lombok.fieldNameConstants.innerTypeName, lombok.copyableAnnotations).
• IMPROBABLE BREAKING CHANGE: The fields generated inside builders for fields with defaults (with @Builder on a class with fields marked @Default) now have $value as the name; direct manipulation of these fields is not advised because there is an associated $set variable that also needs to be taken into account.