variabledeclaratorid
时间: 2023-05-03 19:00:38 浏览: 95
b 'variabledeclaratorid' 是一个 Java 编程语言中的语法规则,它用于声明一个变量的标识符。它通常包含变量类型以及变量名称,例如: int i = 0; 中的 i 就是一个 variabledeclaratorid。
相关问题
Syntax error on token "OrderDaoob", VariableDeclaratorId expected after this token
这个错误一般是因为代码中有语法错误,导致编译器无法识别代码。在你的代码中,可能有一个名为 "OrderDaoob" 的变量声明语句,但是它的语法不正确,导致编译器无法识别它。
你需要检查一下代码,找出这个变量声明语句并修复它的语法错误。可能是拼写错误、缺少分号等问题。如果你不确定如何修复这个错误,可以将相关代码片段贴在这里,我可以帮你找到错误并提供解决方案。
java代码文法产生语言
Java代码的文法可以用BNF(巴克斯-诺尔范式)表示,如下所示:
```
<compilationUnit> ::= [<packageDeclaration>] [<importDeclaration>] {<typeDeclaration>}
<packageDeclaration> ::= "package" <qualifiedName> ";"
<importDeclaration> ::= "import" ["static"] <qualifiedName> ["." "*"] ";"
<typeDeclaration> ::= <classDeclaration> | <interfaceDeclaration>
<classDeclaration> ::= {<modifier>} "class" <identifier> [<typeParameters>] [<superclass>] [<superinterfaces>] <classBody>
<interfaceDeclaration> ::= {<modifier>} "interface" <identifier> [<typeParameters>] [<extendsInterfaces>] <interfaceBody>
<modifier> ::= "public" | "protected" | "private" | "static" | "abstract" | "final" | "native" | "synchronized" | "transient" | "volatile" | "strictfp"
<typeParameters> ::= "<" <typeParameterList> ">"
<typeParameterList> ::= <typeParameter> {"," <typeParameter>}
<typeParameter> ::= <identifier> [<extendsBound>]
<extendsBound> ::= "extends" <type> [<additionalBound> {"," <additionalBound>}]
<additionalBound> ::= "extends" <type>
<superclass> ::= "extends" <classType>
<superinterfaces> ::= "implements" <interfaceTypeList>
<classBody> ::= "{" {<classBodyDeclaration>} "}"
<classBodyDeclaration> ::= <classMemberDeclaration> | <staticInitializer> | <constructorDeclaration>
<classMemberDeclaration> ::= <fieldDeclaration> | <methodDeclaration> | <classDeclaration> | <interfaceDeclaration> | <enumDeclaration>
<staticInitializer> ::= "static" <block>
<constructorDeclaration> ::= {<modifier>} <constructorDeclarator> <throws> <constructorBody>
<constructorDeclarator> ::= <identifier> "(" [<formalParameterList>] ")"
<formalParameterList> ::= <formalParameter> {"," <formalParameter>}
<formalParameter> ::= {<annotation>} [<final>] <type> <variableDeclaratorId>
<variableDeclaratorId> ::= <identifier> [<dims>]
<dims> ::= "[" "]"
<methodDeclaration> ::= {<modifier>} <type> <methodDeclarator> <throws> [<methodBody> | <nativeMethodBody>]
<methodDeclarator> ::= <identifier> "(" [<formalParameterList>] ")"
<methodBody> ::= <block>
<nativeMethodBody> ::= "native" ";"
<fieldDeclaration> ::= {<modifier>} <type> <variableDeclarators> ";"
<variableDeclarators> ::= <variableDeclarator> {"," <variableDeclarator>}
<variableDeclarator> ::= <variableDeclaratorId> ["=" <variableInitializer>]
<variableInitializer> ::= <expression> | <arrayInitializer>
<arrayInitializer> ::= "{" [<variableInitializer> {"," <variableInitializer>}] [","] "}"
<block> ::= "{" {<blockStatement>} "}"
<blockStatement> ::= <localVariableDeclarationStatement> | <statement>
<localVariableDeclarationStatement> ::= <type> <variableDeclarators> ";"
<statement> ::= <expressionStatement> | <declarationStatement> | <ifStatement> | <switchStatement> | <whileStatement> | <doStatement> | <forStatement> | <breakStatement> | <continueStatement> | <returnStatement> | <throwStatement> | <tryStatement>
<expressionStatement> ::= [<expression>] ";"
<declarationStatement> ::= <localVariableDeclarationStatement>
<ifStatement> ::= "if" "(" <expression> ")" <statement> ["else" <statement>]
<switchStatement> ::= "switch" "(" <expression> ")" "{" {<switchBlockStatementGroup>} "}"
<switchBlockStatementGroup> ::= <switchLabels> <blockStatements>
<switchLabels> ::= <switchLabel> {<switchLabel>}
<switchLabel> ::= "case" <constantExpression> ":" | "default" ":"
<blockStatements> ::= {<blockStatement>}
<whileStatement> ::= "while" "(" <expression> ")" <statement>
<doStatement> ::= "do" <statement> "while" "(" <expression> ")" ";"
<forStatement> ::= "for" "(" [<forControl>] ")" <statement>
<forControl> ::= <enhancedForControl> | <forInit> ";" [<expression>] ";" [<forUpdate>]
<enhancedForControl> ::= <type> <variableDeclaratorId> ":" <expression>
<forInit> ::= <localVariableDeclarationStatement> | [<expressionList>]
<forUpdate> ::= <expressionList>
<expressionList> ::= <expression> {"," <expression>}
<breakStatement> ::= "break" [<identifier>] ";"
<continueStatement> ::= "continue" [<identifier>] ";"
<returnStatement> ::= "return" [<expression>] ";"
<throwStatement> ::= "throw" <expression> ";"
<tryStatement> ::= "try" <block> <catches> [<finally>] | "try" <resourceSpecification> <block> [<catches>] [<finally>]
<resourceSpecification> ::= "(" {<resource>} [","] ")"
<resource> ::= <variableModifiers> <classType> <variableDeclaratorId> "=" <expression>
<catches> ::= {<catchClause>}
<catchClause> ::= "catch" "(" <catchFormalParameter> ")" <block>
<catchFormalParameter> ::= [<final>] <catchType> <variableDeclaratorId>
<catchType> ::= <qualifiedName> { "|" <qualifiedName>}
<finally> ::= "finally" <block>
<annotation> ::= "@" <qualifiedName> [<elementValuePairs>] | "@" <qualifiedName> "(" [<elementValuePairs>] ")"
<elementValuePairs> ::= <elementValuePair> {"," <elementValuePair>}
<elementValuePair> ::= <identifier> "=" <elementValue>
<elementValue> ::= <expression> | <annotation> | <elementValueArrayInitializer>
<elementValueArrayInitializer> ::= "{" {<elementValue>} [","] "}"
```
这个文法描述了Java代码的语法结构,可以用于编写Java编译器。