String buffer put together many stirngs

Question

Hi All,
I am trying to JENA java based browsing system. This is the code for query and results. JENA can only get one single query like "String sQuery = request.getParameter("query");". On GUI I made the interface the user can write select, where, and, using, from. So I made put together using stringbuffer method.
Would you see the below code is right? or somethings are strange. Someone says me to use str.concat but I do not know how to use it. I am just beginner on JAVA and JENA API, so would like to get your comments.
Thanks.
Hyunjoo
See Below codes;
String sQuerySelect = request.getParameter("querySelect");
String sQueryWhere = request.getParameter("queryWhere");
String sQueryAnd = request.getParameter("queryAnd");
String sQueryUsing = request.getParameter("queryUsing");
String sQuery = request.getParameter("query");
// query string /// string plus plus plus
sQuery = new StringBuffer().append("SELECT ").append("sQuerySelect").append(" WHERE ").append("sQueryWhere").append(" AND ").append("sQueryAnd").append(" USING ").append("sQueryUsing)
.toString()
String sQueryFrom = request.getParameter("queryFrom");
String sResult = request.getParameter("result");
model.read(sQueryFrom);
Query query = new Query(sQuery)
query.setSource(model);

Answer 1

String sQuerySelect = request.getParameter("querySelect");
String sQueryWhere = request.getParameter("queryWhere");
String sQueryAnd = request.getParameter("queryAnd");
String sQueryUsing = request.getParameter("queryUsing");
String sQuery = request.getParameter("query");
// query string /// string plus plus plus
sQuery = "SELECT "+sQuerySelect+" WHERE "+sQueryWhere+" AND "+sQueryAnd+" USING "+sQueryUsing;
String sQueryFrom = request.getParameter("queryFrom");
String sResult = request.getParameter("result");
model.read(sQueryFrom);
Query query = new Query(sQuery)
query.setSource(model);