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package com.javatechie;

import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.stream.Collectors;

public class NthHighestSalaryDemo {

public static void main(String[] args) {

Map<String, Integer> map1 = new HashMap<>();

map1.put("anil", 1000);

map1.put("bhavna", 1300);

map1.put("micael", 1500);

map1.put("tom", 1600);//output

map1.put("ankit", 1200);

map1.put("daniel", 1700);

map1.put("james", 1400);

Map.Entry<String, Integer> results = getNthHighestSalary(4, map1);

System.out.println(results);

Map<String, Integer> map2 = new HashMap<>();

map2.put("anil", 1000);

map2.put("ankit", 1200);

map2.put("bhavna", 1200);

map2.put("james", 1200);

map2.put("micael", 1000);

map2.put("tom", 1300);

map2.put("daniel", 1300);

//System.out.println(getNthHighestSalary(2, map2));

System.out.println(getDynamicNthHighestSalary(3, map1));

}

public static Map.Entry<String, Integer> getNthHighestSalary(int num, Map<String, Integer> map) {

return map.entrySet().stream()

.sorted(Collections.reverseOrder(Map.Entry.comparingByValue()))

.collect(Collectors.toList())

.get(num - 1);

}

public static Map.Entry<Integer, List<String>> getDynamicNthHighestSalary(int num, Map<String, Integer> map) {

return map.entrySet()

.stream()

.collect(Collectors.groupingBy(Map.Entry::getValue,

Collectors.mapping(Map.Entry::getKey, Collectors.toList())

))

.entrySet()

.stream()

.sorted(Collections.reverseOrder(Map.Entry.comparingByKey()))

.collect(Collectors.toList())

.get(num - 1);

}

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NthHighestSalaryDemo.java

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