Identifiers

• Identifiers can begin with a letter, an underscore, or a currency character.
• After the first character, identifiers can also include digits.
• Identifiers can be of any length.
• JavaBeans methods must be named using camelCase, and depending on the method's purpose, must start with set, get, is, add, or remove.

Example

• MyData
• mydata
• MYDATA
• y
• i
• _$123
• _mydata
• $mydata
• _10data
• mydata10
• _$hellot
• this_is_my_data