Add Employee class and RemoveDuplicatesBasedOnName class to manage employee data and remove duplicates based on department

Author: kumarcodes

src/main/java/com/topfifty/Employee.java

@@ -0,0 +1,46 @@
+package com.topfifty;
+
+public class Employee {
+    int id;
+    String name;
+    String department;
+
+    @Override
+    public String toString() {
+        return "Employee{" +
+                "id=" + id +
+                ", name='" + name + '\'' +
+                ", department='" + department + '\'' +
+                '}';
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public void setId(int id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public String getDepartment() {
+        return department;
+    }
+
+    public void setDepartment(String department) {
+        this.department = department;
+    }
+
+    public Employee(int id, String name, String department) {
+        this.id = id;
+        this.name = name;
+        this.department = department;
+    }
+}

src/main/java/com/topfifty/RemoveDuplicatesBasedOnName.java

@@ -0,0 +1,26 @@
+package com.topfifty;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
+public class RemoveDuplicatesBasedOnName {
+    public static void main(String[] args) {
+        List<Employee> employees = Arrays.asList(
+                new Employee(1, "Alice", "Engineering"),
+                new Employee(2, "Bob", "Sales"),
+                new Employee(3, "Charlie", "Engineering"),   // same department as Alice
+                new Employee(4, "David", "Sales"),           // same department as Bob
+                new Employee(5, "Eve", "HR")
+        );
+        List<Employee> result = employees.stream().collect(Collectors.groupingBy(Employee::getDepartment)).values().stream()
+                .map(x -> x.get(0)).toList();
+        System.out.println(result);
+        Collection<Employee> resultList = employees.stream()
+                .collect(Collectors.toMap(Employee::getDepartment, e -> e, (x, y) -> x))
+                .values();
+        System.out.println(resultList);
+    }
+}