How to sort the name along with age in java

Question

I am new to Java 8. I just want to sort by the name. But the condition is: if there are duplicate names then it should be sorted according to age.

For example my inp

Answer 1

Currently you are a) only comparing by one attribute and b) not really making use of Java 8's new features.

With Java 8 you can use method references and chained comparators, like this:

Collections.sort(persons, Comparator.comparing(Person::getFname)
    .thenComparingInt(Person::getAge));

This will compare two Person instances first by their fname and - if that is equal - by their age (with a slight optimization to thenComparingInt to avoid boxing).