查找浮点值的ArrayList的最小值

Question

I'm having all sorts of problems trying to do something that I expected to be quite simple. I have an ArrayList of float values, and I want to return the minimum value in the list as a float. I expected something like this to work:

public float getMin(){
float min = Collections.min(Arrays.asList(listOfThings)));
return min;
} 

but I keep running into loads of incompatibility problems.

What's the most efficient way of doing this?

Thanks

Answer 1

If you use Collection as generic, Collection.min returns Object so you should convert it.

do this:

Object obj = Collections.min(arrayList);
Float f = Float.parseFloat(obj.toString());
return f.floatValue();

Or simply define ArrayList as

ArrayList<Float> 

and you don't need to convert it.

Answer 2

如果您使用的是Java8，则可以使用流对象来实现您的目标：

float value = list.stream().min(Comparator.<Float>naturalOrder()).get();