Startup/Shutdown database through java code

Question

I am trying to shutdown/startup my database 10gr2 using a java code.
I am able to shutdown db through EM dbconsole .. so there should be way to perform these steps using java prog.
Issue I am getting is that "shutdown immeidate" is not a valid sql statement.
do "shutdown" command strickly belongs to sqlplus only
[ shutdown/ shutdown immeidate/shutdown abort ] .. nothing works
Error is
Connected ..
Shuting down database..
java.sql.SQLException: ORA-00900: invalid SQL statement
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:331)
Any idea how we can achive it
here ismy code ..
======================
/* shutdown/startup database */
import java.sql.*;
import oracle.jdbc.driver.*;
class DBTest
     public static void main (String args[])
     Connection connection = null;
     try {
          // Load the JDBC driver
          String driverName = "oracle.jdbc.driver.OracleDriver";
          Class.forName(driverName);
          // Create a connection to the database
          String serverName = "127.0.0.1";
          String portNumber = "1521";
          String sid = "prod";
          String url = "jdbc:oracle:thin:@" + serverName + ":" + portNumber + ":" + sid;
          String username = "sys as sysdba";
          String password = "password";
          connection = DriverManager.getConnection(url, username, password);
          System.out.println("Connected ..");
          System.out.println("Shuting down database..");
          Statement stmt = connection.createStatement();
          stmt.execute("shutdown immediate");
          stmt.close();
          System.out.println("Shuting down database complete..");
          connection.close();
     } catch (ClassNotFoundException e) {
          e.printStackTrace();
          // Could not find the database driver
     } catch (SQLException e) {
     e.printStackTrace();
          // Could not connect to the database
==================================

Answer 1

Link is perfect for OCI users.
Do anyone have an idea how 10g enterprise manager console stops database server. Whats happening in background when shutdown button is clicked after provided database and host credential.