The trim() statement in getHeaderFieldDate(String, long) ignores the return value

The trim() statement in method getHeaderFieldDate, class java.netHttpURLConnection ignores the return value.

    public long getHeaderFieldDate(String name, long Default) {
String dateString = getHeaderField(name);
try {
dateString.trim();
if (dateString.indexOf("GMT") == -1) {
dateString = dateString+" GMT";
}
return Date.parse(dateString);
} catch (Exception e) {
}
return Default;
    }


Strings are immutable, the trim function

dateString.trim();

returns a new String value, which is being ignored here. It should be

dateString = dateString.trim();

###@###.### 2005-1-26 16:25:55 GMT