Starting and Stopping the SAP Web AS J2EE System (Windows) 
You use this procedure to start and stop the SAP system after the installation. You can use the SAP Management Console or the SAP NetWeaver Developer Studio to start and stop the SAP system.
You have to start the following components:
Database (SAP DB)
Central Services (Enqueue Service and Message Service)
J2EE instance
Software Deployment Manager (SDM)
You have administrator rights on the SAP system host.
On the SAP system host, choose .
You get the following window:

Right-click the SAP system node (C11 in this example) in the left-hand panel and choose Start.
The SAP DB, the Central Services and the SAP J2EE instance start.
Note
You can start only the SAP DB as follows:
Select the database node.
In the right-hand panel, the Database Manager is displayed.
In the Database Manager, choose Online.
The database status changes to online (green color).
When the processes are running, you see the following screen:

To display the status of all processes, choose the process list subnode of the required node in the left-hand panel.
The JControl process starts the dispatcher and the server. To display the dispatcher and server status, choose Process Table.
Choose .
In the left-hand panel, right-click the SAP Systems node and choose Stop.
You can also start the SAP system from within the SAP NetWeaver Developer Studio.
The SAP DB is running and online. You can start it using the SAP Management Console (see above) or the SAP Database Manager.
Choose .
Select the option SAP J2EE engine is installed on local host and choose Browse.
You see the system ID of the installed SAP system (e.g. C11).
Select the system and choose OK two times.
In the top menu, choose
The J2EE Engine view is opened.
In the J2EE Engine view, right-click the Local engine node and choose Start local engine.
The processes are started.
Click on the
Refresh tree icon.
In the right panel of the J2EE Engine view, the status of the process is displayed.

J2EE Startup and Control Frameworkin the Architecture Manual