Method compareToIgnoreCase

lib/java/lang/String.java:635–651

Compares the specified string to this string using the Unicode values of the characters, ignoring case differences. Returns 0 if the strings contain the same characters in the same order. Returns a negative integer if the first non-equal character in this string has a Unicode value which is less tha

(String string)

     *             if {@code string} is {@code null}.
     */
    public int compareToIgnoreCase(String string) {
        int o1 = offset, o2 = string.offset, result;
        int end = offset + (count < string.count ? count : string.count);
        char c1, c2;
        char[] target = string.value;
        while (o1 < end) {
            if ((c1 = value[o1++]) == (c2 = target[o2++])) {
                continue;
            }
            c1 = compareValue(c1);
            c2 = compareValue(c2);
            if ((result = c1 - c2) != 0) {
                return result;
            }
        }
        return count - string.count;
    }

    /**
     * Concatenates this string and the specified string.