Naming conventions
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Naming conventions in Java make code more readable by standardizing naming. Package names use all lowercase and top-level domains; subpackages follow an organization's conventions. Class names are nouns in mixed case with internal words capitalized. Interface names match classes. Method names are verbs in mixed case with initial lowercase and internal words capitalized. Variables use mixed case with initial lowercase and internal capitalization, and should be short but meaningful. Constants are all uppercase with underscores between words.
Naming conventions
- 2. Why? • Naming conventions make programs more understandable by making them easier to read
- 3. Packages • Is always written in all-lowercase ASCII letters and should be one of the top-level domain names, currently com, edu, gov, mil, net, org, or one of the English two-letter codes identifying countries as specified in ISO Standard 3166, 1981. • Subsequent components, according to an organization's own internal naming conventions. Such conventions might specify that certain directory name components be division, department, project, machine, or login names.
- 4. Example • com.sun.eng • com.apple.quicktime.v2 • edu.cmu.cs.bovik.cheese
- 5. Classes • Should be nouns, in mixed case with the first letter of each internal word capitalized. • Try to keep your class names simple and descriptive. • Use whole words-avoid acronyms and abbreviations.
- 6. Example • class Raster; • class ImageSprite; • class RequestQueue;
- 7. Interfaces • Interface names should be capitalized like class names. • Example : interface RasterDelegate; interface Storing;
- 8. Methods • should be verbs, in mixed case with the first letter lowercase, with the first letter of each internal word capitalized. • Example : run(); runFast(); getBackground();
- 9. Variables Are in mixed case with a lowercase first letter. Internal words start with capital letters. • Should not start with underscore _ or dollar sign $ characters, even though both are allowed. • Should be short yet meaningful. The choice of a variable name should be mnemonic- that is, designed to indicate to the casual observer the intent of its use •
- 10. Example • int i, j; • char c; • float myWidth;
- 11. Constants • The names of variables declared class constants and of ANSI constants should be all uppercase with words separated by underscores ("_"). (ANSI constants should be avoided, for ease of debugging.)
- 12. Example • static final int MIN_WIDTH = 4; • static final int MAX_WIDTH = 999; • static final int GET_THE_CPU = 1;