Multiple Sorting of Map Datastructure in Java | Map Datastructure in Java | Sort Map
A class Employee
A Map of (Integer, Employee) where the key is Employee ID
Multiple entries inserted into the map
Sorting the map:
First by ID (Map key)
Then by Department
Then by Employee Name
Since a Map itself does not support multi-level sorting directly, we convert the entries to a Stream and apply a Comparator chain
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