Java 8 Distinct by property

Question

In Java 8 how can I filter a collection using the Stream API by checking the distinctness of a property of each object?

For example I have a list of

Answer 1

I had a situation, where I was suppose to get distinct elements from list based on 2 keys. If you want distinct based on two keys or may composite key, try this

class Person{
    int rollno;
    String name;
}
List personList;


Function> compositeKey = personList->
        Arrays.