Float t=y+z; st1.executeUpdate("INSERT INTO doc_rsv (nom_doc,score_F)values('"+filename+"',+t+")");"
st1.executeUpdate("INSERT INTO doc_rsv (nom_doc,score_F)values('"+filename+"',"+t+")");
PreparedStatement pstmt = con.prepareStatement"INSERT INTO doc_rsv (nom_doc,score_F)values(?,?)"); pstmt.setString(1, filename); pstmt.setFloat(2, y+z); .....