Hello Friends,
You already have your ABAP stack running now its time to install JAVA stack on same server you have ABAP stack running
Sun SWPM and select following (SAP Solution Manager 7.2 Support Release 1 >> SAP Solution Manager 7.2 JAVAP Support Release 1 >> MS SQL Server >> SAP System >> Application Server JAVA >> Standard System >> Standard System )

As previously mentioned always select Custom

For ABAP system I gave SID and SXA and for JAVA SXJ

Do not use ABAP database configure new DB

Continue with default

Continue default

User setting must be as below since ABAP stack installation is creating users

No SLD registration for now

Continue with default option

Wait till installation complete and your both systems are up and running as below

Now next step is instaling Support Pack stack 03 installation
Thank you for reading
Yogesh