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The choice of a variable name should be mnemonic — that is, designed to indicate to the casual observer the intent of its use. One-character variable names should be avoided except for temporary "throwaway" variables. Common names for temporary variables are i, j, k, m, and n for integers; c, d, and e for characters. int i;
A snippet of Java code with keywords highlighted in bold blue font. The syntax of Java is the set of rules defining how a Java program is written and interpreted. The syntax is mostly derived from C and C++. Unlike C++, Java has no global functions or variables, but has data members which are also regarded as global variables.
An identifier I' (for variable X') masks an identifier I (for variable X) when two conditions are met I' has the same name as I; I' is defined in a scope which is a subset of the scope of I; The outer variable X is said to be shadowed by the inner variable X'. For example, the parameter "foo" shadows the local variable "foo" in this common pattern:
All of these class names are valid (as $ symbols are permitted in the JVM specification) and these names are "safe" for the compiler to generate, as the Java language definition advises not to use $ symbols in normal java class definitions. Name resolution in Java is further complicated at runtime, as fully qualified names for classes are ...
A fundamental distinction in scope is what "part of a program" means. In languages with lexical scope (also called static scope), name resolution depends on the location in the source code and the lexical context (also called static context), which is defined by where the named variable or function is defined.
If a variable is only referenced by a single identifier, that identifier can simply be called the name of the variable; otherwise, we can speak of it as one of the names of the variable. For instance, in the previous example the identifier "total_count" is the name of the variable in question, and "r" is another name of the same variable.
Common refactoring activities are changing variable names, renaming methods, moving methods or whole classes and breaking large methods (or functions) into smaller ones. Agile software development methodologies plan for regular (or even continuous) refactoring making it an integral part of the team software development process .
The Elements of Java Style is a book of rules of programming style in the Java computer language. [1] The book was published by Cambridge University Press in January 2000. The book provides conventions for formatting, naming, documentation, programming and packaging.