done collections problems

JavaCourse/src/main/java/com/rinftech/animals/DomesticAnimal.java

@@ -1,6 +1,6 @@
 package com.rinftech.animals;
 
-import jdk.nashorn.internal.codegen.CompilerConstants;
+//import jdk.nashorn.internal.codegen.CompilerConstants;
 
 import java.util.Objects;
 

JavaCourse/src/main/java/com/rinftech/collections/Employee.java

@@ -0,0 +1,29 @@
+package com.rinftech.collections;
+
+public class Employee extends Person {
+    private Integer employeeId;
+
+    private String title;
+
+
+    public Employee() {
+    }
+
+    public Employee(Integer employeeId, String title) {
+        this.employeeId = employeeId;
+        this.title = title;
+    }
+
+    public Integer getEmployeeId() {
+        return employeeId;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    @Override
+    public String getLastName() {
+        return super.getLastName() + " is " + this.getTitle();
+    }
+}

JavaCourse/src/main/java/com/rinftech/collections/Person.java

@@ -0,0 +1,24 @@
+package com.rinftech.collections;
+
+public class Person {
+
+    private String firstName;
+    private String lastName;
+
+    public Person() {
+
+    }
+
+    public Person(String firstName, String lastName) {
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+}

JavaCourse/src/main/java/com/rinftech/collections/Probl10.java

@@ -0,0 +1,38 @@
+package com.rinftech.collections;
+
+import java.util.*;
+
+public class Probl10 {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        try {
+//            List<String> array = readArray(scanner);
+//            String color = scanner.nextLine();
+            List<String> array = new ArrayList<>(Arrays.asList(
+                    "eat", "tea", "tan", "ate", "nat", "bat", "listen", "silent", "enlist", "hello", "world", "dlrow"
+            ));
+            Map<String, List<String>> result = groupAnagrams(array);
+            System.out.println(result.toString());
+        } catch (Exception e) {
+            System.out.println(e);
+        } finally {
+            scanner.close();
+        }
+    }
+
+    public static Map<String, List<String>> groupAnagrams(List<String> words) {
+        Map<String, List<String>> anagramsMap = new HashMap<>();
+
+        for (String word : words) {
+            char[] chars = word.toCharArray();
+            Arrays.sort(chars);
+            String sortedWord = new String(chars);
+            if (!anagramsMap.containsKey(sortedWord)) {
+                anagramsMap.put(sortedWord, new ArrayList<>());
+            }
+            anagramsMap.get(sortedWord).add(word);
+        }
+
+        return anagramsMap;
+    }
+}

JavaCourse/src/main/java/com/rinftech/collections/Probl5.java

@@ -0,0 +1,47 @@
+package com.rinftech.collections;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+public class Probl5 {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        try {
+            List<String> firstArray = readArray(scanner);
+            List<String> secondArray = readArray(scanner);
+            List<String> result = findCommonElements(firstArray, secondArray);
+            System.out.println(result.toString());
+        }
+        catch (Exception e) {
+            System.out.println(e);
+        }
+        finally {
+            scanner.close();
+        }
+    }
+
+    public static List<String> readArray(Scanner scanner) {
+        System.out.print("Enter the size of the array: ");
+        int size = scanner.nextInt();
+        scanner.nextLine();
+        List<String> array = new ArrayList<>();
+        for (int i = 0; i < size; i++) {
+            System.out.print("Enter element " + (i + 1) + ": ");
+            array.add(scanner.nextLine());
+        }
+        return array;
+    }
+
+    public static List<String> findCommonElements(List<String> array1, List<String> array2) {
+        List<String> result = new ArrayList<>();
+        for (String element : array1) {
+            for (String element1 : array2) {
+                if (element.equals(element1)) {
+                    result.add(element);
+                }
+            }
+        }
+        return result;
+    }
+}