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How to Sort Java ArrayList in Descending Order

By using Collections.reverseOrder(Comparator<T>cmp) method, we can sort the collection in reverse order. The reverseOrder() method does the reversing on the basis of given Comparator. In case of null, it will reverse collection in natural ordering.

Let's see a simple example to sort the ArrayList in descending order.

SmartPhone.java

ArrayListLearning.java

Output:

Actual List
[SmartPhone [brand=Apple, model=6s, price=50000, rating=10], 
SmartPhone [brand=lg, model=pro2, price=40000, rating=9], 
SmartPhone [brand=MI, model=3s, price=10000, rating=6], 
SmartPhone [brand=Letv, model=le2, price=12000, rating=7]]
Sorting the list as comparator
[SmartPhone [brand=MI, model=3s, price=10000, rating=6], 
SmartPhone [brand=Letv, model=le2, price=12000, rating=7], 
SmartPhone [brand=lg, model=pro2, price=40000, rating=9], 
SmartPhone [brand=Apple, model=6s, price=50000, rating=10]]
Reversing the Comparator sorting
Printing the reverse list
[SmartPhone [brand=Apple, model=6s, price=50000, rating=10], 
SmartPhone [brand=lg, model=pro2, price=40000, rating=9], 
SmartPhone [brand=Letv, model=le2, price=12000, rating=7], 
SmartPhone [brand=MI, model=3s, price=10000, rating=6]]





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