好像把"08"这样的字符串当做8进制了,而日期的月份小于10时MM获取到就是两位数0开头,一下代码转的时候报错

public class Test {
    public static void main(String[] args) {
        Nums.Radix ni = Nums.evalRadix("08");
        Integer.valueOf(ni.val,ni.radix);
    }
}

public static Radix evalRadix(String str) {
    if (str.startsWith("0x"))
        return new Radix(str.substring(2), 16);
    if (str.startsWith("0") && str.length() > 1)
        return new Radix(str.substring(1), 8);
    if (str.startsWith("0b"))
        return new Radix(str.substring(2), 2);
    return new Radix(str, 10);
}

Exception in thread "main" java.lang.NumberFormatException: For input string: "8"
	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
	at java.lang.Integer.parseInt(Integer.java:580)
	at java.lang.Integer.valueOf(Integer.java:740)
	at Test.main(Test.java:13)