|  |  |  | 
|---|
|  |  |  | return null; | 
|---|
|  |  |  | } | 
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|  |  |  |  | 
|---|
|  |  |  | public CityAqi() { | 
|---|
|  |  |  | } | 
|---|
|  |  |  |  | 
|---|
|  |  |  | public CityAqi(CityAqiDaily cityAqiDaily) { | 
|---|
|  |  |  | this.cityCode = cityAqiDaily.getCityCode(); | 
|---|
|  |  |  | this.value = cityAqiDaily.getValue(); | 
|---|
|  |  |  | this.time = cityAqiDaily.getTime(); | 
|---|
|  |  |  | } | 
|---|
|  |  |  |  | 
|---|
|  |  |  | public CityAqi(CityAqiMonthly cityAqiMonthly) { | 
|---|
|  |  |  | this.cityCode = cityAqiMonthly.getCityCode(); | 
|---|
|  |  |  | this.value = cityAqiMonthly.getValue(); | 
|---|
|  |  |  | this.time = cityAqiMonthly.getTime(); | 
|---|
|  |  |  | } | 
|---|
|  |  |  |  | 
|---|
|  |  |  | public CityAqi(CityAqiYearly cityAqiYearly) { | 
|---|
|  |  |  | this.cityCode = cityAqiYearly.getCityCode(); | 
|---|
|  |  |  | this.value = cityAqiYearly.getValue(); | 
|---|
|  |  |  | this.time = cityAqiYearly.getTime(); | 
|---|
|  |  |  | } | 
|---|
|  |  |  | } | 
|---|