Difference between Comparable and Comparator. Difference between Abstract Class and Interface

Question

Accepted Answer

Comparable is an interface used for natural ordering, Comparator is an interface used for custom ordering. Abstract class can have method implementations, Interface cannot.

Comparable interface is used to define the natural ordering of objects. Example: String class implements Comparable interface for natural ordering based on alphabetical order.
Comparator interface is used to define custom ordering of objects. Example: Sorting a list of objects based on a specific attribute using a Comparator.
Abstract class can have method implementations. Interface cannot have method implementations, only method signatures. Abstract classes can have constructors, interfaces cannot.

Accepted Answer

In Comparable we use compare to() method and comparator we use compare() method
Abstract class means which hides the unnecessary data and shows the necessary data ex:- ATM, pendrive,TV remote
Interface means which allows only abstract method and hide the data

Difference between Comparable and Comparator. Difference between Abstract Class and Interface

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