It means that on newer JDKs, a wrapper class will be created automatically when a primitive type is used anywhere a reference type is expected. As such, on post JDK 1.5 versions of the JVM, the ...

Szymon Guz writes about his results in benchmarking primitive types and wrapper classes in “Primitives and objects benchmark in Java” (SimonOnSoftware, January 2011).

Changing the wrapper class to its primitive type. By David Tayouri ; November 17, 2000; ENTERPRISE JAVA Invoke Servlet Methods From Java Apps David Tayouri Listing 4. Changing the wrapper class to its ...

Use the parse method of another wrapper class.; Use the deprecated constructor of the Long class and autobox into a primitive long. Use the parse method of a different wrapper class, such as Integer.; ...