Extracting just the value of the variable from the result of Solve/NDSolve

*To*: mathgroup at smc.vnet.net*Subject*: [mg62803] Extracting just the value of the variable from the result of Solve/NDSolve*From*: Pradeep Suresh <pradeep at purdue.edu>*Date*: Mon, 5 Dec 2005 13:41:11 -0500 (EST)*References*: <dmpa43$hl7$1@smc.vnet.net> <200512032352.SAA15963@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Hi all, i am facing a peculiar problem with the curly brackets of the output of Solve and NDsolve commands....the result of Solve/NSolve/DSolve/NDSolve all are in the form of {{y->a}} format and at best by doing a y/.soln, i can get it to {a}, but for my purposes of passing this result to JAVA(using J/Link), i need the value of the variable as just 'a' and not '{a}'(i hope i am making myself clear). E.g. eqn={F==2*T}; T = 300; sol = Solve[eqn, F] F /. sol gives me {600}, as i said earlier i need the answer 600(which is different in datatype compared to {600} even though for all practical purposes {600} is the same as 600). When i use J/link to extract value, the {600} is not considered an integer/string/double/function,...so i cannnot use getInteger,getString etc. Can someone plz suggest a solution this problem, however triveal as it may sound, it is an important problem in using J/Link to talk with Mathematica. Thank you very much in advance!! Regards, Pradeep

**Follow-Ups**:**Re: Extracting just the value of the variable from the result of Solve/NDSolve***From:*Renan <renan.birck@Gmail.com>