java代码优化

Question

现在的能跑，但是肯定写的不好。 List<? extends WeatherData> data = weatherReportDao.getCoviReportData(reportType); WeatherENUM weatherENUM = WeatherENUM.valueOf(reportFunction); switch (weatherENUM){ case atmosphere: data = atmosphereReportDao.getAtmosphereReportData(reportType); break; case covi: data = weatherReportDao.getCoviReportData(reportType); break; case windSpeed: data = windSpeedReportDao.getWindSpeedReportData(reportType); break; } return data; 关键就是data的初始化，不初始化会报错。求指导。

Answer 1

List<? extends WeatherData> data = null;

或者想办法把weatherENUM的某个值当作参数传到dao

List<? extends WeatherData> data =  weatherReportDao.getReportData(reportType,dataType);

Answer 2

定义成全局量就不用初始化了。