➡️In this video, we will solve the same problem with the help of the comparator interface in Java. This is also a non-Java8-based solution.
*️⃣The Comparator interface in Java is used to order the objects of a user-defined class. It provides multiple sorting sequences, i.e., you can sort the elements on the basis of any data member, for example, roll no, name, age or anything else.
*️⃣The Comparator interface is found in Java. util package and contains 2 methods:
➡️compare(Object obj1,Object obj2)
➡️equals(Object element)
*️⃣The compare() method is used to compare two objects of the same class. It returns an integer value, which indicates the order of the two objects. The return value is as follows:
➡️-1 if obj1 is less than obj2
➡️0 if obj1 is equal to obj2
➡️1 if obj1 is greater than obj2
*️⃣The equals() method is used to check if two objects are equal. It returns true if the two objects are equal, and false otherwise.
*️⃣The Comparator interface can be used in the following ways:
➡️To sort the elements of a collection.
➡️To compare two objects of the same class.
➡️To provide an ordering for collections of objects that don't have a natural ordering.
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