| Slide 4 of 57 | Lecture 2: Using Objects | |
Identifiers
- Identifier: name of a variable, method, or class
- Rules for identifiers in Java:
- Can be made up of letters, digits, and the underscore (_)
character
- Cannot start with a digit
- Cannot use other symbols such as ? or %
- Spaces are not permitted inside identifiers
- You cannot use reserved words
- They are case sensitive
- By convention, variable names start with a lowercase letter
- By convention, class names start with an uppercase letter