Identifiers
Identifiers are names of things, such as variables, constants, and methods, that appear in programs. A Java identifier consists of letters, digits, the underscore character ( _), and the dollar sign ($), and must begin with a letter, underscore, or the dollar sign.
Data Types
The objective of a Java program is to manipulate data. A Data type is a set of values together with a set of operations. Only certain operations can be performed on a particular type of data.
No comments:
Post a Comment