Sort objects in ArrayList by date?

Question

Every example I find is about doing this alphabetically, while I need my elements sorted by date.

My ArrayList contains objects on which one of the datamembers is a

Answer 1

With introduction of Java 1.8, streams are very useful in solving this kind of problems:

Comparator  myComparator = (arg1, arg2) 
                -> {
                    if(arg1.lt(arg2)) 
                       return -1;
                    else if (arg1.lteq(arg2))
                       return 0;
                    else
                       return 1;
                   };

ArrayList sortedList = myList
                   .stream()
                   .sorted(myComparator)
                   .collect(Collectors.toCollection(ArrayList::new));