I'm not sure your second example data makes sense. But then, I am not familiar with java VM. On a side note, if you are dealing with a number of arguments, a more general solution would be:

#If they arguments are in @ARGV
while (shift){
($arg,$val)=split /=/;
$args{$arg}=$val;
}
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Now you will find all your command line arguments in the hash %args with the argument name as the key, like this:

'-Dname1' => 2 
'-Dname2.3' => "anything" 
'-Djetty.home' => 'c:\a\b\c'
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Hope that's what you are looking for.