eclipse - Changing OS proxy settings using java -

can set/change proxy settings in windows 7 using java application?

i trying use:

public static void setproxy(string proxyurl, string proxyport){     system.getproperties().put("proxyset", "true");     system.getproperties().put("http.proxyhost", proxyurl);     system.getproperties().put("http.proxyport", proxyport); } 

but after run settings doesn't changed , have same ip had before.

even though of languages not allow (or) discourage change environment variables through program, can achieve jni in java using setenv() , using processbuilder().

but why want change every 1 program? instead change variables in program context setting proxy server effective program run time context. that's how applications should designed , programmed.

here example, off top of head.

 public static void main(string[] args) throws exception     {         processbuilder processbuilder = new processbuilder("cmd.exe", "/c", "set");         processbuilder.redirecterrorstream(true);         map<string,string> environment = processbuilder.environment();          //set new envrionment varialbes here         environment.put("proxyset", "true");         environment.put("http.proxyhost", proxyurl);         environment.put("http.proxyport", proxyport);          process process = processbuilder.start();         bufferedreader inputreader = new bufferedreader(new inputstreamreader(process.getinputstream()));         string datalog=null;         while ((datalog = inputreader.readline()) != null)         {             //just see what's going on process             system.out.println(datalog);         }     } 

note: again, discourage practice of changing environment variables program, instead set required ones context.