Java提取字符串首次出现的数字

可以将字符串中的首次出现数字提取出来进行排序

    private static final String REGEXP = "[^0-9]*";
    private static final DecimalFormat FORMAT = new DecimalFormat();
    static {
        FORMAT.setParseBigDecimal(true);
    }
    public static int parseFirstNumber(String numStr,int defVal){
        if (null == numStr || numStr.isEmpty()){
            return defVal;
        }
        String numStrStartWithNum = numStr.replaceFirst(REGEXP, "");

        Number number = null;
        try {
            number = FORMAT.parse(numStrStartWithNum);
        } catch (ParseException e) {
            return defVal;
        }

        return number.intValue();
    }

    public static int parseFirstNumber(String numStr){
        return parseFirstNumber(numStr,0);
    }