public final void skipString() {
        if (ch == '"') {
            for (int i = bp + 1; i < text.length(); ++i) {
                char c = text.charAt(i);
                if (c == '\\') {
                    if (i < len - 1) {
                        ++i;
                        continue;
                    }
                } else if (c == '"') {
                    this.ch = text.charAt(bp = i + 1);
                    return;
                }
            }
            throw new JSONException("unclosed str");
        } else {
            throw new UnsupportedOperationException();
        }
    }
The value of a literal token, recorded as a string. For integers, leading 0x and 'l' suffixes are suppressed.
src/main/java/com/alibaba/fastjson/parser/JSONScanner.java