A Blog About Software Developement Technologies, Frameworks and Methodologies. Tuesday, 15 September 2009. Covariant Return Types in Java 5. Are one of the newly added features in Java 5. Using covariant return types,. An overridden method in a derived class can return a type derived from the type returned by the base-class method. For example in the Java versions prior to Java 5, the following would have thrown a compile time error. The return type is incompatible with Vehicle.

In normal RESTful which produces normal string JSON response, you can use the javax. Here jsonObject is an object of a Serializable class.

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