wrapper type 예문

예문

1. The wrapper type Void is often used when a unit type parameter is needed.
2. So unless the variable that is assigned to has type boolean ( or wrapper type Boolean ), there will be a compile error.
3. Java does not support type lifting as a concept, but all of the built-in primitive types have corresponding wrapper types, which do support the null value by virtue of being reference types ( classes ).
4. Series 1 had problems on faster processors of the Amiga, and games were getting bigger, very few loaded everything in one hit anymore, so early Series 1 was now dead and so was the wrapper type Series 1.
5. According to the Java spec, any attempt to dereference the null reference must result in an exception being thrown at run-time, specifically a NullPointerException . ( It would not make sense to dereference it otherwise, because, by definition, it points to no object in memory . ) This also applies when attempting to unbox a variable of a wrapper type, which evaluates to null : the program will throw an exception, because there is no object to be unboxed-and thus no boxed value to take part in the subsequent computation.