Identifiers and keywords

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Preface

The standardized naming is conducive to our development and team collaboration

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One 、 identifier

1. Naming rules

2. Naming specification

1. Package name ： All letters are lowercase when multiple words are formed ： aaa.bbb.ccc // such as com.hsp.crm

2. Class name 、 The interface name ： When there are many words , Capitalize all words ： XxxYyyZzz
   [ hump ] such as ： TankShotGame

3. Variable name 、 Method name ： When there are many words , First word initial lowercase , The second word begins with each word capitalized ： xxxYyyZzz [ Small
   hump , abbreviation Hump method ]
   such as ： tankShotGame

4. Constant names ： All letters are capitalized . When there are many words, each word is connected with an underscore ： XXX_YYY_ZZZ such as ： Define an income tax rate TAX_RATE

Two 、 keyword

Definition ： By Java Language gives special meaning to , String used for special purpose （ word ）
characteristic ： All letters in the keyword are lowercase

There is no need to recite these keywords , Remember it when you use it too much

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3、 ... and 、 Reserved words

Java Reserved words ： existing Java The version is not yet in use , But later versions may be used as keywords . Avoid using these reserved words when naming your own identifier

byValue、cast 、future 、 generic 、
inner 、 operator 、 outer 、 rest 、
var 、 goto 、const