java判断是否是中文

public boolean checkcountname(String countname)
    {
         Pattern p = Pattern.compile("[\u4e00-\u9fa5]");
            Matcher m = p.matcher(countname);
            if (m.find()) {
                return true;
            }
            return false;
    }

public boolean checkname(String name)
    {
        int n = 0;
        for(int i = 0; i < name.length(); i++) {
            n = (int)name.charAt(i);
            if(!(19968 <= n && n <40869)) {
                return false;
            }
        }
        return true;
    }