数据库查询

//查询单词  
                 
               public  void  query()  
           {  
                         
                       try  
                       {  
                                     
                                   Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");  
                       }  
                       catch  (ClassNotFoundException  e)  
                       {  
                                   tfAnswer.setText("sun.jdbc.odbc.JdbcOdbcDriver  not  found!\n");  
                       }  
                       catch(LinkageError  e){  
                                   tfAnswer.setText("sun.jdbc.odbc.JdbcOdbcDriver  not  found!\n");  
                       }  
                         
                         
                       try  
                       {  
                                   connect  =  DriverManager.getConnection("jdbc:odbc:words");  
                                   sql  =  connect.createStatement();  
                       }  
                       catch  (SQLException  e)  
                       {  
                                   tfAnswer.setText("SQLException  when  open!\n");  
                       }  
                         
                       try  
                       {  
                                   String  word  =  (tfAnswer.getText()).trim();  
                                   rset  =  sql.executeQuery("SELECT  *  FROM  words  WHERE  english='"  +  word.toLowerCase()  +  "'");  
                                   if  (rset.next())  
                                   {  
                                               tfAnswer.setText(rset.getString(1)  +  "  :  "  +  rset.getString(2)  +  "\n");  
                                   }  
                                   else  
                                   {  
                                               tfAnswer.setText(word  +  "  is  not  found!\n");  
                                   }  
                                   connect.close();  
                                     
                       }  
                       catch  (SQLException  e)  
                       {  
                                   tfAnswer.setText("SQLException  when  query!\n");  
                       }  
                         
                         
           }  
 
 
可是执行到Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");  
就不执行了  
我是调用if(e.target==bEnter){  
                         
                                               query();  
             
                       }  
怎么回事呀  
还请高手赐教；不胜感激