Sort ArrayList of custom Objects by property
- by Samuel
Hello World!! :D
I had a question which is pretty easy if you know the answer I guess. I read about sorting ArrayLists using a Comparator but somehow in all of the examples people used compareTo which according to some research is a method working on Strings...
I wanted to sort an ArrayList of custom objects by one of their properties: a Date object
(getStartDay()). Normally I compare them by item1.getStartDate().before(item2.getStartDate()) so I was wondering whether I could write something like:
public class customComparator {
public boolean compare(Object object1, Object object2) {
return object1.getStartDate().before(object2.getStartDate());
}
}
public class randomName {
...
Collections.sort(Database.arrayList, new customComparator);
...
}
I just started with Java so please forgive my ignorance :)
Thanks in advance!!
-Samuel
