Default system not displaying And where we find JAVA server?

Hello SAP Gurus,

I'm using NWDS 7.3 , my problem is i add one default system in NWDS after adding system also system is not displaying in the table.Foe creating default system in NWDS i follow this path : Windows->Preferences-->SAP as JAVA after that  i click add button and provided appropriate host name and instance no.I set add to domain is default. But the system in visible i  SAP System try.

  For reference please observe the bellow attached screen shoot's.    

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After Creating system:-

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And one more question is that where can we find java server in NWDS 7.3 . With out this how we know that java server is existing and it is working.

Please guide me..

Thanks in advance.

Reagrds,

Srinivas