Java language foundation - Identifier

Java language foundation - Identifier

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What is the identifier?

• In the Java source code among programmers who have the right to name their own words are identifiers.
• Identifier may identify what elements?
  1. The class name
  2. Method name
  3. Interface name
  4. Constant name

Identifier naming rules? (grammar)

• Only numbers, letters, underscores _ the dollar sign ($) composition, can not contain other symbols.
• You can not start with a number
• Strict distinction between the case
• Keywords can not do identifier
• In theory no length limit , it is best not too long

Naming identifiers? (Just standard, not part of the syntax, do not comply with specifications not being given)

• Best to see to know the name meaning : that saw the name, I know this is what to do with.
• Compliance hump naming :
  1. Class name, interface name : capitalize the first letter of each word capitalized later.
  2. Variable names, method names : lowercase first letter, after each initial capital letters.
  3. Constant name : All caps