comparable and comparator in java

Publicado em: 08 Dezembro 2016
no canal de: Inside App

176

Comparable and Comparator

Comparable and Comparator both are interfaces and can be used to sort collection elements.

But there are many differences between Comparable and Comparator interfaces that are given below.

Comparable

Comparator

1) Comparable providessingle sorting sequence. In other words, we can sort the collection on the basis of single element such as id or name or price etc.

Comparator provides multiple sorting sequence. In other words, we can sort the collection on the basis of multiple elements such as id, name and price etc.

2) Comparable affects the original class i.e. actual class is modified.

Comparator doesn't affect the original class i.e. actual class is not modified.

3) Comparable providescompareTo() methodto sort elements.

Comparator provides compare() method to sort elements.

4) Comparable is found in java.lang package.

Comparator is found in java.utilpackage.

5) We can sort the list elements of Comparable type byCollections.sort(List)method.

We can sort the list elements of Comparator type byCollections.sort(List,Comparator)method.
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