Get the current system user name

PROCESS p = NULL;
Properties envvars = new properties ();
Runtime r = runtime. getruntime ();
Try {
P = r.exe C ("cmd.exe/C set user ");
Bufferedreader BR =
New bufferedreader (New inputstreamreader (P. getinputstream ()));
String line; // The first line is the machine name, and the second line is the user name currently logged in,
// The third is the main folder of the current login user.
While (line = Br. Readline ())! = NULL ){
Int idx = line. indexof ('= ');
String key = line. substring (0, idx );
String value = line. substring (idx + 1 );
Envvars. setproperty (Key, value );
System. Out. println (Key + "=" + value );
}
} Catch (exception e ){
E. printstacktrace ();
}