Method regionMatches

vm/JavaAPI/src/java/lang/String.java:586–608

Compares the specified string to this string and compares the specified range of characters to determine if they are the same. @param thisStart the starting offset in this string. @param string the string to compare. @param start the starting offset in the specified

(int thisStart, String string, int start, int length)

     *             if {@code string} is {@code null}.
     */
    public boolean regionMatches(int thisStart, String string, int start, int length) {
        if (string == null) {
            throw new NullPointerException("string == null");
        }
        if (start < 0 || string.count - start < length) {
            return false;
        }
        if (thisStart < 0 || count - thisStart < length) {
            return false;
        }
        if (length <= 0) {
            return true;
        }
        int o1 = offset + thisStart, o2 = string.offset + start;
        char[] value1 = value;
        char[] value2 = string.value;
        for (int i = 0; i < length; ++i) {
            if (value1[o1 + i] != value2[o2 + i]) {
                return false;
            }
        }
        return true;
    }

    /**
     * Tests if two string regions are equal.