Java 比較兩個字符串的大小

比較兩個字符串的大小

 static int compareTo(String s1, String s2) {
        int len1 = s1.length();
        int len2 = s2.length();
        int lim = Math.min(len1, len2);
        char[] charS1 = s1.toCharArray();
        char[] charS2 = s2.toCharArray();
        int k = 0;
        while (k < lim) {
            char c1 = charS1[k];
            char c2 = charS2[k];
            if (c1 != c2)
                return c1 - c2;
            k++;
        }
        return len1 - len2;
    }