public boolean isInBoth(String value, String[] arrayA, String[] arrayB) {
        return doesArrayContainValue(arrayA, value) && doesArrayContainValue(arrayB, value);
    }

    private boolean doesArrayContainValue(String[] array, String value) {
        return Optional.ofNullable(array)
                .stream()
                .flatMap(Arrays::stream)
                .anyMatch(value::equals);
    }

// or

private boolean doesArrayContainValue(String[] array, String value) {
        if(Objects.isNull(array)) {
            return false;
        }

        for(String item : array) {
            if (value.equals(item)) {
                return true;
            }
        }

        return false;
    }