Java Identifiers Follow specifications

• Package name All letters are lowercase, for example: Com.qiuyin.test.
• The class name and interface name are capitalized on the first letter of each word, for example: UserName, Iterator.
• Constant names All letters are capitalized, and the words are underlined, for example: Day_of_month.
• The first letter of the variable name and method name is lowercase, starting with the first letter of each word from the second word, for example: LineNumber, Getlinenumber
• program, try to use meaningful English words to define identifiers, make the program easy to read. For example, use username to represent a user name and password to represent a password.

Java Identifiers Follow specifications