java - What is reason for sql result set couldn't return result set? -

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i'm trying return result set method. i'm sure sql query out put result set. because in "while(rs.next())" method print values. problem when i'm returning result set values , try calling "while(rs.next())" in calling method doesn't print value. reason that?

/* calling method */

    public void corpusretrivedemo(){     arraylist<string> wordall= new arraylist<string>();             /* word list corpus retrive */     wordall=allwordslist(sentence1);     resultset rsnew=corpussentenceretrive(wordall);       try {         while (rsnew.next()) {             system.out.println("heloooo2...");         }     } catch (sqlexception e) {         // todo auto-generated catch block         e.printstacktrace();     }      /* uni gram calculate */      double d1=calculateprobunigram(wordall,rsnew);     system.out.println(d1);  }

/* database retrieve method */

    public resultset corpussentenceretrive(list wordlist) {     preparedstatement pstmtfgram = null;     connection conn = null;     resultset rs2 = null;     stringbuilder sb = new stringbuilder();     try {         conn = getconnection();         sb.append("select cor_sentence corpus ");              for(int k=0;k<wordlist.size();k++){                  sb.append( " cor_sentence '%" + wordlist.get(k) + "%' or ");              }                   sb.append(" 1=0");                   pstmtfgram = conn.preparestatement(sb.tostring());              rs2 = pstmtfgram.executequery();             while (rs2.next()) {                 system.out.println("heloo1...");             }     } catch (exception e) {         e.printstacktrace();     }      return rs2;  }

"heloo1" printing correctly. calling method "helooo2" doesn't print. reason that? there wrong return statement?

as in question appending string string builder.

one thing thing that. @ last final string become like.

select cor_sentence corpus  cor_sentence '%" + wordlist.get(k) + "%' or cor_sentence '%" + wordlist.get(k) + "%' or

due sql query trowing exception.

another way saying helloo1 printing. please comment below line in code , test.

 while (rs2.next()) {             system.out.println("heloo1...");                     }

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