Not able to perform update in MS ACCESS 2007 using prepared stmt using jdbc

I am writing a code to update a specific column in access db by executing a java code. Here is what i have done till now.

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.Statement;
import java.io.*;

public class Main 
{

  private static Connection getConnection() throws Exception{
    String driver = "sun.jdbc.odbc.JdbcOdbcDriver";
    String url = "jdbc:odbc:repo3";
    String username = "";
    String password = "";
    Class.forName(driver);
    return DriverManager.getConnection(url, username, password);
  }


   public static void main(String[] args) throws Exception 
   {
    Connection conn = getConnection();
    Statement st = conn.createStatement();

    ResultSet rs = st.executeQuery("SELECT READABLEKEY,OBJECTID,LOCALEID,REFTRANSLATION FROM Dummy where TRANSLATION =''");
    int i=0;
   try {
         while(rs.next())
         {
            i++;
          String Readable_Key=rs.getString("READABLEKEY");
          String Object_Id=rs.getString("OBJECTID");
          int Locale_Id=rs.getInt("LOCALEID");
           //String RefTranslation=rs.getString("REFTRANSLATION");
           System.out.println("here");
         BufferedReader br = new BufferedReader(new InputStreamReader(rs.getAsciiStream("REFTRANSLATION")));
         String RefTranslation = br.readLine();
         br.close();


           System.out.println("locale id is"+Locale_Id);

             switch(Locale_Id)
             {
             case 12297:
             String UpdtTranslation="UPDATE Dummy set TRANSLATION='GER"+RefTranslation+"'WHERE LOCALEID="+Locale_Id+"";          
             System.out.println("update query is "+UpdtTranslation);
             st.executeUpdate(UpdtTranslation);

             int r=st.executeUpdate(UpdtTranslation);
             System.out.println(r+"rows updated successfully!");

             }

        }
        System.out.println("I is "+i);//to see no.of records.
    }
    catch(Exception e) 
    {
    e.printStackTrace();
    }    
        finally
        {
                    try
                    {
                    st.close();
                    conn.close();
                    }
                    catch(Exception e)
                    {

                    }
                    finally
                    {

                    }
        }

    }

}

I know we can make use of Prepared statement too. I even tried u开发者_JAVA百科sing that. But i don't know how to update all the rows using prepared stmt. I tried using for loop. But, what should be the condition? i mean do i have to specify the no.of rows myslef? or should i write a separate code for getting the counts? Please do let me know whether my above approach is correct or not. If NOT please tell me the looping in prepared stmt.

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try UPDATE Dummy set TRANSLATION='GER' & TRANSLATION where READABLEKEY=12297 to update the existing value with a string