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我已经编写了一个可以减少文本的语法边界的代码，但是当我运行程序时会出现这个异常 

java.lang.ClassCastException

这是我运行的课程，

public class paerser {
public static void main (String [] arg){
    LexicalizedParser lp = new LexicalizedParser("grammar/englishPCFG.ser.gz");
        lp.setOptionFlags("-maxLength", "500", "-retainTmpSubcategories");
        TreebankLanguagePack tlp = new PennTreebankLanguagePack();
       GrammaticalStructureFactory gsf = tlp.grammaticalStructureFactory();
       String text = "John, who was the CEO of a company, played golf.";
       edu.stanford.nlp.trees.Tree parse = lp.apply(Arrays.asList(text));
       GrammaticalStructure gs = gsf.newGrammaticalStructure(parse);
       List<TypedDependency> tdl = gs.typedDependenciesCCprocessed();
       System.out.println(tdl);

}
}

更新，

这是完整的堆栈跟踪...

Loading parser from serialized file grammar/englishPCFG.ser.gz ... done [1.5 sec].
Following exception caught during parsing:
java.lang.ClassCastException: java.lang.String cannot be cast to edu.stanford.nlp.ling.HasWord
    at edu.stanford.nlp.parser.lexparser.ExhaustivePCFGParser.parse(ExhaustivePCFGParser.java:346)
    at edu.stanford.nlp.parser.lexparser.LexicalizedParser.parse(LexicalizedParser.java:386)
    at edu.stanford.nlp.parser.lexparser.LexicalizedParser.apply(LexicalizedParser.java:304)
    at paerser.main(paerser.java:19)
Recovering using fall through strategy: will construct an (X ...) tree.
Exception in thread "main" java.lang.ClassCastException: java.lang.String cannot be  cast to edu.stanford.nlp.ling.HasWord
    at edu.stanford.nlp.parser.lexparser.LexicalizedParser.apply(LexicalizedParser.java:317)
    at paerser.main(paerser.java:19)
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1 回答 1

3

Stacktrace 显示正在使用ExhaustivePCFGParser 的 parse 方法。它需要一个 HasWord 对象列表。您正在传递一个字符串列表。因此，例外。

public boolean parse(List<? extends HasWord> sentence) { // ExhaustivePCFGParser
于 2012-03-13T07:06:13.640 回答