Removing the java instace and install again

Dear Admin,
I have problem in  java instace starting problem becuase of system copy process.
my system details are
ecc6.0 on abap+java
when seen the instace and check the j2ee process list not shown and also gives instace missing error in bootstarp.
i want to remove the j2ee (java instace only)
how to remove this ?
how to install it again ?
can i install java instace when abap instace is on.
thnaks and reagards,
Ravi

In installation guide have what you want to know.
remove java instance step;
You use this procedure if you want to delete a single SAP instance or all instances of a SAP system.
Note
Make sure that you delete the instances in the following order:
1. Dialog instance if there are any
2. Central instance
3. Central services instance if there is one
1. Stop the SAP instance that you want to delete as follows:
a) Log on as user <sapsid>adm.
b) Execute this command:
stopsap r3 <InstanceName>
2. Stop the sapstart service with the following command:
sapcontrol -nr <InstanceNumber> -prot NI_HTTP -function StopService
3. Stop the saposcol process with the following command:
saposcol -k
4. Remove the instance profiles as follows:
rm /usr/sap/<SAPSID>/SYS/profile/<SAPSID>_<InstanceName>_<host_name>
rm /usr/sap/<SAPSID>/SYS/profile/START_<InstanceName>_<host_name>
Example
For example, enter the following commands:
rm /usr/sap/C11/SYS/profile/START_D00_h0001
rm /usr/sap/C11/SYS/profile/C11_D00_h0001
5. Log on as user root and delete the local instance directory:
rm -rf /usr/sap/<SAPSID>/<InstanceName>
6. Change to the directory /usr/sap, edit the file sapservices and delete the line that refers to
the instance to be deleted.
add-on java;
Using sapinst in life-cycle menu to select install add-on java instance.

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