Java Eclipse中的编译错误-方法引用了缺少的类型

我写了以下两行：

OCLContextDefinitionMCParser parser = new OCLContextDefinitionMCParser();
Optional<ASTOCLContextDefinition> invariant = parser.parse(model.toString());

当我查看位于

OCLContextDefinitionMCParser

中的

parse

的签名时，我可以看到：

public Optional<oclgrammarDefinition.oclgrammarDefinition._ast.ASTOCLContextDefinition> parse(String filename) throws IOException, RecognitionException {
...
}

---

您的项目构建路径中似乎没有包含类oclgrammarDefinition.oclgrammarDefinition.\u ast.ASTOCLContextDefinition的jar。您缺少一个库。我第一次使用eclipse。我不知道这是什么意思。右键单击您的项目，选择“配置构建路径”，然后添加缺少的库（即jar文件）。所有库都在那里。当我点击“库”选项卡时，我可以看到我使用的所有库。我没有其他库要添加。然而，Eclipse抱怨缺少一个类。。。当您键入Ctrl-shift-T（或Mac上的Cmd-shift-T）时，然后在类型名称中键入

ASTOCLContextDefinition

，它是否找到该类？

public Optional<oclgrammarDefinition.oclgrammarDefinition._ast.ASTOCLContextDefinition> parse(String filename) throws IOException, RecognitionException {
...
}

Description Resource    Path    Location    Type
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 105    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 106    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 106    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 156    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 157    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 157    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 316    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 317    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 359    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 359    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 412    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 496    Java Problem
ASTAnyExpr cannot be resolved to a type ASTOCLAnyExpression.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 507    Java Problem
ASTAnyExpr cannot be resolved to a type AnyExprMCParser.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_parser line 99 Java Problem
ASTAnyExpr cannot be resolved to a type AnyExprMCParser.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_parser line 102    Java Problem
ASTAnyExpr cannot be resolved to a type OCLGrammarASTAnyExprCoCo.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_cocos  line 9  Java Problem
ASTAnyExpr cannot be resolved to a type OCLGrammarCoCoChecker.java  /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_cocos  line 408    Java Problem
ASTAnyExpr cannot be resolved to a type OCLGrammarInheritanceVisitor.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_visitor    line 212    Java Problem
ASTAnyExprList cannot be resolved to a type OCLGrammarASTAnyExprListCoCo.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_cocos  line 9  Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 105    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 106    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 106    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 156    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 157    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 157    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 314    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 315    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 359    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 359    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 412    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 487    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 498    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 573    Java Problem
ASTIfThenElseStatement cannot be resolved to a type ASTOCLIfThenElseExpr.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_ast    line 592    Java Problem
ASTIfThenElseStatement cannot be resolved to a type IfThenElseStatementMCParser.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_parser line 99 Java Problem
ASTIfThenElseStatement cannot be resolved to a type IfThenElseStatementMCParser.java    /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_parser line 102    Java Problem
ASTIfThenElseStatement cannot be resolved to a type OCLGrammarASTIfThenElseStatementCoCo.java   /oclgrammar/target/generated-sources/monticore/sourcecode/oclgrammar/oclgrammar/_cocos  line 9  Java Problem