Adding Wildcards to the Java Programming Language
Feb 8th, 2010 | By administrator | Category: JavaThis paper describes wildcards, a new language construct designed to increase the ? exibility of object-oriented type systems with parameterized classes. Based on the notion of use site variance, wildcards provide a type safe abstraction over diferent instantiations of parameterized classes, by using ‘?’ to denote unspecifed type arguments. Thus they essentially unify the distinct [...]
