How to sort a List<Object> alphabetically using Object name field

Question

I have a List of Objects like List<Object> p.I want to sort this list alphabetically using Object name field. Object contains 10 field and name field is one of them.

if (list.size() > 0) {     Collections.sort(list, new Comparator<Campaign>() {         @Override         public int compare(final Object object1, final Object object2) {         return String.compare(object1.getName(), object2.getName());         }     } ); } 

But there is nothing like String.compare..?

Answer 1

From your code, it looks like your Comparator is already parameterized with Campaign. This will only work with List<Campaign>. Also, the method you're looking for is compareTo.

if (list.size() > 0) {   Collections.sort(list, new Comparator<Campaign>() {       @Override       public int compare(final Campaign object1, final Campaign object2) {           return object1.getName().compareTo(object2.getName());       }   }); } 

Or if you are using Java 1.8

list   .stream()   .sorted((object1, object2) -> object1.getName().compareTo(object2.getName())); 

One final comment -- there's no point in checking the list size. Sort will work on an empty list.