Download e-book for iPad: Java in a nutshell: a desktop quick reference by Benjamin J Evans, David Flanagan

By Benjamin J Evans, David Flanagan

For those who locate that Javadoc tough to learn (like me) or will not be "always on" the net, it is a nice substitute. the 1st few chapters are fairly - brief, candy and to the purpose - a pass among Javadoc and a cookbook and is kind of readable.

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We saw in the last chapter that close analogies can be drawn between Java and C. The same is not true for Java and C++, however. Java uses object-oriented programming concepts that are familiar to C++ programmers and even borrows C++ syntax in a number of places, but the similarities between Java and C++ are not nearly as strong as those between Java and C. Don't let your experience with C++ lull you into a false familiarity with Java. Index terms contained in this section C/C++ languages C++ object-oriented programming, Java vs.

In this case, it is implicit that the method is being invoked on the this object. You can use the this keyword explicitly when you want to make it clear that a method is accessing its own fields and/or methods. r; } This code also uses the class name explicitly to refer to class field PI. In a method this simple, it is not necessary to be explicit. In more complicated cases, however, you may find that it increases the clarity of your code to use an explicit this where it is not strictly required.

1 The Members of a Class As we discussed in Chapter 2, a class is a collection of data, stored in named fields, and code, organized into named methods, that operates on that data. The fields and methods are called members of a class. 1 and later, classes can also contain other classes. These member classes, or inner classes, are an advanced feature that is discussed later in the chapter. For now, we are going to discuss only fields and methods. , with objects). Ignoring member classes for now, this gives us four types of members: 38 39 • Class fields • Class methods • Instance fields • Instance methods The simple class definition for the class Circle, shown in Example 3-1, contains all four types of members.

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