java - passing and parsing object input dialog value to database table -

i want know how integer value input dailog box 

and query inside select statement looks error input box type per below object , have no idea how parse object integer accepted select statement please advise how handle object type inputbox variables , inject same select

private void inputval(){

       // here input box retrieve user entry       object journal_no = joptionpane.showinputdialog(               null,    "please enter journal no.?:\n",  "search", joptionpane.plain_message,               null,null,"");       if (journal_no.equals("")){           joptionpane.showmessagedialog(null, "please enter correct no.");           return;         }        // here call sql statement load table rely on //inputbox        try {   string host1=  "jdbc:derby://localhost:1527//accountsdb";   string uname1="accounts";   string upass1="accounts";    con1=drivermanager.getconnection(host1,uname1 ,upass1);     //string sql ="select * log password= jtuser.gettext()  " ;    string sql1="select * jounral journal_no=" +   journal_no + "  ";    stmt1=con1.createstatement(resultset.type_scroll_sensitive,     resultset.concur_updatable);        rs=stmt1.executequery(sql1);              while (rs.next()){                  //load values              date jdate  =rs.getdate("journal_date");              txt_date.setdate(jdate);             int jno;       jno = rs.getint("journal_no");             jljournal_no.settext(integer.tostring(jno));             }         }          catch (sqlexception ex) {               system.out.println(ex.getmessage())   ;      }        } 

if int use int journalno = integer(objectvalue);

else convert string , int. able catch numberformatexception in case.

object string:

string journalnumber = objectvalue.tostring();

string int:

int journalnumberasint = integer.parseint(journalnumber);