THE Java™ Programming Language, Fourth Edition

References of interface type, however, can be used only to access members of that interface. For example, the following will pro ...

interface Verbose { int SILENT = 0; int TERSE = 1; int NORMAL = 2; int VERBOSE = 3; void setVerbosity(int level); int getVerbosi ...

4.3. Extending Interfaces Interfaces can be extended using the extends keyword. Interfaces, unlike classes, can extend more than ...

you can do System.out.println("Z.val=" + Z.val + ", Z.sum=" + Z.sum); but there is no way to refer to X.val via Z. However, give ...

Similarly, if an interface inherits more than one method with the same signature, or if a class implements different interfaces ...

To create an Attributed type you could define a class that would form the superclass for all attributed objects. But then progra ...

Attributed, so the class must implement all the interface's methods. AttributedImpl implements the methods using a HashMap, desc ...

celestial body class Body: import java.util.Iterator; class AttributedBody extends Body implements Attributed { private Attribut ...

4.6. When to Use Interfaces An interface defines a type with an abstract contract. An abstract class also defines a type with an ...

obvious deficiencies. C.A.R. Hoare Chapter 5. Nested Classes and Interfaces Every nonzero finite-dimensional inner product space ...

[1] This is a very common structuring idiom. Static nested classes serve as a mechanism for defining logically related types wit ...

5.1.2. Nested Interfaces Nested interfaces are also always static and again, by convention the static modifier is omitted from t ...

object is created, as shown in the deposit and withdraw methods. When an inner class object is created, it must be associated wi ...

objects associated with it, or it could have many. When deposit creates an Action object, a reference to the enclosing BankAccou ...

If the enclosing class of the inner subclass is not a subclass of Outer, or if the inner subclass is not itself an inner class, ...

The increment method appears to increment the x field of the enclosing Host instance. In fact, Unknown also declares a field x a ...

local variable or parameter could be invoked after the completion of the method in which the local class was definedand hence th ...

difference is that once a local variable or parameter has been hidden it is impossible to refer to it. 5.3.1. Inner Classes in S ...

public Object setValue(Object nv) { System.out.println("Name set to " + nv); return super.setValue(nv); } }; In the Iterator exa ...

} The intent is that the class HighSpeedPrinter.SerialPort overrides the class Printer.SerialPort so that serial is set to refer ...