[Tiles] Tiles Documentation

Java/Tiles 2014.01.07 16:46

[Java] Class<?> 의 의미?

Java/Java 2013.01.21 11:18

링크 : http://docs.oracle.com/javase/tutorial/java/generics/wildcards.html 




In generic code, the question mark (?), called the wildcard, represents an unknown type. The wildcard can be used in a variety of situations: as the type of a parameter, field, or local variable; sometimes as a return type (though it is better programming practice to be more specific). The wildcard is never used as a type argument for a generic method invocation, a generic class instance creation, or a supertype.

The following sections discuss wildcards in more detail, including upper bounded wildcards, lower bounded wildcards, and wildcard capture.

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