Question 8: The merge(K key, V value, remappingFunction) function is …

1import java.util.*;
2
3public class DepartmentScores {
4    public static void main(String[] args) {
5        Map<String, Integer> dept1 = new TreeMap<>();
6        dept1.put("HR", 75);
7        dept1.put("Finance", 80);
8        dept1.put("Tech", 95);
9
10        Map<String, Integer> dept2 = new TreeMap<>();
11        dept2.put("Finance", 85);
12        dept2.put("Tech", 90);
13        dept2.put("HR", 78);
14        dept2.put("Admin", 70);
15
16        Map<String, Integer> combined = new TreeMap<>();
17
18        for (Map.Entry<String, Integer> e : dept1.entrySet())
19            combined.put(e.getKey(), e.getValue()); //LINE 1
20
21        for (Map.Entry<String, Integer> e : dept2.entrySet())
22            combined.merge(e.getKey(), e.getValue(),
23                (oldVal, newVal) -> Math.max(oldVal, newVal));
24
25        System.out.println(combined);
26    }
27}