Thread: unable to execute prepared statement

my code

package jdbcstatements;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
 
 
import java.sql.SQLException;
 
 
 
 
 
public class Insertion {
 
 
 
	public static void main(String[] args) throws SQLException {
 
		try {   
	      Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
	      String url="jdbc:oracle:thin:@localhost:1521:orcl";
 
	    Connection  con=DriverManager.getConnection(   url,   "scott", "tiger");
	      System.out.println("connection created");	 
 
 
try{
 
	          String sql = "INSERT EMP VALUES(?)";
	          PreparedStatement prest = con.prepareStatement(sql);
	          BufferedReader bf = new BufferedReader(new InputStreamReader(System.in));
	          System.out.println("Enter employee name:");
	          String ename = bf.readLine();
	          prest.setString(2,ename);
	          System.out.println("Enter salaryof employee:");
	          int sal = Integer.parseInt(bf.readLine());
	          prest.setInt(2, sal);
	          int count = prest.executeUpdate();
	          System.out.println(count + "row(s) affected");
	          con.close();
	        }
	        catch (SQLException s){
	          System.out.println("SQL statement is not executed!");
	        }
	      }
	catch (Exception e){
	      e.printStackTrace();
	    }
 
 
 
	}
}

error

connection created
Enter movie name:
xxxx
SQL statement is not executed!