Just Java(TM) 2 (6th Edition) by Peter van der Linden

By Peter van der Linden

E-book do disguise all of the subject matters yet not likely intimately. It used to be my direction requirement.

Show description

By Peter van der Linden

E-book do disguise all of the subject matters yet not likely intimately. It used to be my direction requirement.

Show description

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Additional resources for Just Java(TM) 2 (6th Edition)

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Most languages have around ten or so built-in simple or primitive types. These are types like character, boolean, int, floating point number, and so on. Primitive types have no visible internal structure, and often correspond to types that are directly supported in hardware. It is easy to overlook the significance of what primitive types add to a programming language, because you get so much behavior implicitly just by mentioning the type name. Be very clear on the distinction between a type and a primitive variable as shown in Table 2-1.

5, though it may come in future. Operator overloading was left out of Java originally because it is easy to misuse, resulting in confusing and hard-tomaintain code. When used correctly, however, operator overloading can be a cool feature. Here's an example. Assume we have some class with this declaration and initialization: Timestamp t = new Timestamp(); Now we can access the fields of the object t points to. hrs = 12; This says "Go to the object that t is pointing to and assign to its hrs field".

There is a predefined class type corresponding to each of the eight primitive types. You can now cast both ways between values of a primitive type and its corresponding object type. In fact, you don't even have to cast! You can make the assignment directly. There is more about this in Autoboxing and Unboxing on page 55. " Always use the uppercase letter "L" instead. , 0xA5L or OxABadBabbeL All long literals are 64-bit quantities. A long literal must be cast to assign it to something with fewer bits, such as byte, short, int, or char.

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