一个从字符串中提取金额的正则表达式

        
一个从字符串中提取金额的正则表达式，初学者，写得有点乱，请大家指正
            String str = "asd2312.3fasf-0.114fa+234.3sdf";

            //String regxp = "[^(-)?(([1-9]{1}\\d*)|([0]{1}))(\\.(\\d){1,2})?]";
            String regxp = "((-)?(([1-9]{1}\\d*)|([0]{1}))(\\.(\\d){1,2})?)";
     
        
            Pattern p = Pattern.compile(regxp);
            Matcher m = p.matcher(str);
            while (m.find()) {
                String pStr = m.group();
                System.out.println(pStr);
            }