java - Unnecessarily long regex -

i have string pattern i'm trying match. can contain words enclosed within 2 curly braces. these curly braces have well-formed , cannot nested.

for example:

i have {{example}} right here {{is}} {{example}} right {{ {{ example }} wrong }} {{ }}example {{ { wrong }} 

i have constructed regex seems work long , think can simplified.

"^([^{}]*\\{\\{([^{}]*)\\}\\}[^{}]*)+$"

is there way can simplify this?

it easier negative match. is, not allowed:

\\{\\{[^}]*\\{ 

and use matcher.find(). trying positive match difficult same reason using regex against xml problematic.

if want grab contents of braces should suffice

\\{\\{(\\w+\\)}\\}