What is an identifier in java

#Identifiers in Java are names used by users when programming. They are used to name variables, constants, functions, statement blocks, etc.

Java identifiers consist of numbers, letters and underscore (_), dollar sign ($). Java is case-sensitive, and it is also required that the first digit cannot be a number. Most importantly, Java keywords cannot be treated as Java identifiers.

Naming convention:

1. Just know the name and don’t make it too long

2.camel camel case principle

3. Package naming: all Lowercase multi-level packages are separated by ., for example: teng.xun

4. Class || One word is all lowercase, starting with the second word, the first letter of each word is capitalized taoBao

6. Constant: All capitals are used to separate each word using **_** GUO_WU_YUAN

Keywords: Identifiers with special meanings defined in advance in Java, sometimes called reserved words, and variables with special meanings

All keywords are lowercase, and the colors in the IDE are displayed differently

Reserved words: only goto const

In java, some words may have their own usage or purposes in the future. These words are reserved words

For more java knowledge, please pay attention

java basic tutorial

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