package comparator;

import java.util.Collections;

import java.util.Comparator;

import java.util.List;

import dataclasses.Developer;

public class ComparatorEx {

public static void main(String[] args) {

List<Developer> listHuman = Developer.getDevelopers();

//first init

printList(listHuman,"Before");

//OldSortMethod

oldSorting(listHuman);

//Lambda

sortWithLambdaExp(listHuman);

//reverse sorting

reverseSortingWithLambda(listHuman);

}

private static void oldSorting(List<Developer> list) {

Collections.sort(list, new Comparator<Developer>() {

@Override

public int compare(Developer o1, Developer o2) {

return o1.getAge() - o2.getAge();

}

});

printList(list,"After Old Method");

}

private static void sortWithLambdaExp(List<Developer> list) {

list.sort((Developer o1,Developer o2)->o1.getSalary().compareTo(o2.getSalary()));

printMethodLambda(list, "After New Lambda Method");

}

private static void reverseSortingWithLambda(List<Developer> list) {

Comparator<Developer> nameComparator = (o1,o2)->o1.getName().compareTo(o2.getName());

list.sort(nameComparator.reversed());

printMethodLambda(list, "After reverse name sorting");

}

private static void printMethodLambda(List<Developer> list,String state) {

System.out.println(state);

list.forEach((dev)-> System.out.println(dev.getName() + " " + dev.getAge() + " " + dev.getSalary()));

}

private static void printList(List<Developer> list,String state) {

System.out.println(state);

for(Developer dev:list) {

System.out.println(dev.getName() + " " + dev.getAge() + " " + dev.getSalary());

}

}

}