java - My Lucene search doesn't return results -

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i'm studying lucene , first test class. i'm trying implement in memory search , borrowed codes examples. search cannot return hits. can me please? thanks.

    package my.test;     import java.io.ioexception;      import org.apache.lucene.analysis.standard.standardanalyzer;     import org.apache.lucene.analysis.util.chararrayset;     import org.apache.lucene.document.document;     import org.apache.lucene.document.field;     import org.apache.lucene.document.stringfield;     import org.apache.lucene.index.indexwriter;     import org.apache.lucene.index.indexwriterconfig;     import org.apache.lucene.index.indexwriterconfig.openmode;     import org.apache.lucene.index.term;     import org.apache.lucene.search.booleanclause;     import org.apache.lucene.search.booleanquery;     import org.apache.lucene.search.indexsearcher;     import org.apache.lucene.search.prefixquery;     import org.apache.lucene.search.scoredoc;     import org.apache.lucene.search.searchermanager;     import org.apache.lucene.store.ramdirectory;     import org.apache.lucene.util.version;      public class testinmemorysearch {       public static void main(string[] args) {         // construct ramdirectory hold in-memory representation of index.         ramdirectory idx = new ramdirectory();      try {       // make writer create index       indexwriterconfig iwc = new indexwriterconfig(version.lucene_42, new standardanalyzer(version.lucene_42, chararrayset.empty_set));       iwc.setopenmode(openmode.create_or_append);       indexwriter writer = new indexwriter(idx, iwc);        // add document objects containing quotes       writer.adddocument(createdocument("theodore roosevelt man", "it behooves every man remember work of "           + "critic, of altogether secondary importance, , that, " + "in end, progress accomplished man " + "things."));       writer.adddocument(createdocument("friedrich hayek", "the case individual freedom rests largely on "           + "recognition of inevitable , universal ignorance " + "of of concerning great many of factors on "           + "which achievements of our ends , welfare depend."));       writer.adddocument(createdocument("ayn rand", "there nothing take man's freedom away "           + "him, save other men. free, man must free " + "of brothers."));       writer.adddocument(createdocument("mohandas gandhi", "freedom not worth having if not connote " + "freedom err."));        // optimize , close writer finish building index       writer.close();       // build indexsearcher using in-memory index       searchermanager mgr = new searchermanager(idx, null);        try {         document[] hits = search(mgr, "man", 100);         (document doc : hits) {           string title    = doc.get("title");           string content  = doc.get("content");           system.out.println("found match:[title]" + title + ", [content]" + content);         }        } catch (ioexception e) {         e.printstacktrace();       }      } catch (ioexception ioe) {       // in example aren't doing i/o,       // exception should never thrown.       ioe.printstacktrace();     }   }    /**    * make document object un-indexed title field , indexed    * content field.    */   private static document createdocument(string title, string content) {     document doc = new document();     doc.add(new stringfield("title", title, field.store.yes));     doc.add(new stringfield("content", content, field.store.yes));      return doc;   }    private static document[] search(searchermanager searchmanager, string searchstring, int maxresults) throws ioexception {     indexsearcher searcher = null;     try {       // build query.       string[] tokens = searchstring.split("\\s+");       booleanquery query = new booleanquery();       (string token : tokens) {         query.add(new prefixquery(new term("title", token)), booleanclause.occur.must);         query.add(new prefixquery(new term("content", token)), booleanclause.occur.must);       }        searcher = searchmanager.acquire();       scoredoc[] scoredocs = searcher.search(query, maxresults).scoredocs;       document[] documents = new document[scoredocs.length];       (int = 0; < scoredocs.length; i++) {         documents[i] = searcher.doc(scoredocs[i].doc);       }       return documents;     } {       if (searcher != null) {         searchmanager.release(searcher);       }     }   }     }

stringfield seems obvious choice, isn't want use here. want textfield. stringfield represents field single token, keyword or identifier. textfield analyzes , tokenizes field full-text searching.

fixing simple changing, in search method:

doc.add(new stringfield("title", title, field.store.yes)); doc.add(new stringfield("content", content, field.store.yes));

to

doc.add(new textfield("title", title, field.store.yes)); doc.add(new textfield("content", content, field.store.yes));

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