Josh Cuevas :
Collections.max(arraylist)
doesn't work, and a regular for
loop won't work either.
What I have is:
ArrayList<Forecast> forecasts = current.getForecasts();
Collections.max(forecast)
gives me this error:
The method max(Collection<? extends T>) in the type Collections is
not applicable for the arguments (ArrayList<Forecast>)
The ArrayList
holds Forecast
objects which each has an int
field for the temperature of each day. I am trying to store the max in an int max.
Ousmane D. :
As your ArrayList
contains Forecast
objects you'll need to define how the max
method should find the maximum element within your ArrayList
.
something along the lines of this should work:
ArrayList<Forecast> forecasts = new ArrayList<>();
// Forecast object which has highest temperature
Forecast element = Collections.max(forecasts, Comparator.comparingInt(Forecast::getTemperature));
// retrieve the maximum temperature
int maxTemperature = element.getTemperature();
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