对象数组列表-最小值 [英] Arraylist of objects - smallest value

问题描述

我有一个对象数组列表，并且这些对象具有双精度"值.我需要打印出所有对象，并首先打印出具有最高值的对象，最后打印出具有最低值的对象.

I have an arraylist of objects, and the objects have "double" values. I need to print out all the objects, and have the object with the highest value printed first, and the object with the lowest value last.

我也曾尝试使用Collections对arraylist进行排序，然后进行打印，但是我似乎无法使其正常工作.

I have also tried to use Collections to sort the arraylist and then print, but I can't seem to get it to work.

我的数组列表是:

ArrayList<Transition> transitions = new ArrayList<Transition>();

当我尝试使用收藏集时，我使用了:

When i tried to used Collections i used:

Object minValue = Collections.min(transitions);

希望你们中的一些人可以提供帮助:)

Hope some of you can help :)

推荐答案

如果Transition对象实现了Comparable接口，请尝试这种方式.应该可以.

If Transition object implemented Comparable interface try this way. It should work.

 Collections.sort(transitions);
 Transition transition = transitions.get(0);

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