How can we sort a list of Objects?

If we need to sort an array of Objects, we can use Arrays.sort(). If we need to sort a list of objects, we can useCollections.sort(). Both these classes have overloaded sort() methods for natural sorting (using Comparable) or sorting based on criteria (using Comparator). 

Collections internally uses Arrays sorting method, so both of them have same performance except that Collections take sometime to convert list to array.