Java – retrieve words from strings

I have this line:

(ADDRESS = (PROTOCOL = XXX)(HOST = YYY)(PORT = ZZZ))

I need to retrieve the host name, in this case YYY

I don't know if it's lowercase or uppercase, or even a mixture of them So I passed line Touppercase() switches the whole line to uppercase, then splits the line according to host = and I select characters until I get it), which indicates the end of the host name

I'm sure there's a better way to do this Any tips will be appreciated

My code:

String host = "";
line = line.toUpperCase();
int i = line.indexOf("HOST");
while(line.charAt(i)!='=')
    i++;
while(line.charAt(i)!=')') {
    i++;
    if(line.charAt(i)!=')'&&line.charAt(i)!=' ')
       host = host + line.charAt(i);
}
return host;

Solution

attempt

String s= "(ADDRESS = (PROTOCOL = XXX)(HOST = YYY)(PORT = ZZZ)) }";
    String host = s.replaceAll("^.+\\((HOST|host) *= *(.+?)\\).+$","$2");