Java JDBC CallableStatement run stored procedure

import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.SQLException;
import java.sql.Types;

public class Main {
   public static void callableStatementEx(Connection conn){
      CallableStatement cs = null;
      try {//  ww w  .j a v  a2 s . c om
      cs = conn.prepareCall("{call MY_PROC(?,?)}");
      cs.setString(1, "This is a test");
      cs.registerOutParameter(2, Types.VARCHAR);
      cs.executeQuery();

      System.out.println(cs.getString(2));

      } catch (SQLException ex){
          ex.printStackTrace();
      }
  }
}