JAVA比較兩個版本號的大小

 

 

 

 /**
     *  比較版本號的大小 （兩個版本號格式應盡量相同）
     *
     * @param v1 版本號1
     * @param v2 版本號2
     * @return 正數：v1大   負數：v2大  0：相等
     */
    public static int checkVersion(String v1, String v2) {
        String[] verArr1 = v1.split("\\.");
        String[] verArr2 = v2.split("\\.");
        int idx = 0;
        int minLength = Math.min(verArr1.length, verArr2.length);
        int diff = 0;
        while (idx < minLength
                && (diff = verArr1[idx].length() - verArr2[idx].length()) == 0
                && (diff = verArr1[idx].compareTo(verArr2[idx])) == 0) {
            ++idx;
        }
        diff = (diff != 0) ? diff : verArr1.length - verArr2.length;
        return diff;
    }


    public static void main(String[] args) {
        System.out.println(checkVersion("V1.1.1", "V1.1.3"));
    }