D

data hiding

The practice of making the data of a class as inaccessible to other classes as possible.

debug code

Code whose purpose is to tell the developer about what is going on inside a program.

declaration

Code that tells the compiler the type of a variable or the return type, argument types, and exception types of a method.

default access

Mode that grants access to all classes in the same package as the class that defines the default feature.

default constructor

A no-args constructor created by the compiler for any class that does not have ant constructors.

deprecated method

A method that was introduced in an early revision of Java and should not be used.

destination directory

The directory where the compiler will store a package structure.

dialog box

A window, subordinate to its program’s main frame, that is used for brief user interaction.

digital circuit

A circuit where voltages represent 0 or 1.

digital computers

Computers composed of digital circuits.

double (keyword)

64-bit floating-point primitive data type.