diff --git a/src/main/java/com/thealgorithms/backtracking/MColoring.java b/src/main/java/com/thealgorithms/backtracking/MColoring.java
index c9bc0200..93b17941 100644
--- a/src/main/java/com/thealgorithms/backtracking/MColoring.java
+++ b/src/main/java/com/thealgorithms/backtracking/MColoring.java
@@ -1,6 +1,5 @@
 package com.thealgorithms.backtracking;
 
-import java.io.*;
 import java.util.*;
 
 /**
diff --git a/src/main/java/com/thealgorithms/datastructures/dynamicarray/DynamicArray.java b/src/main/java/com/thealgorithms/datastructures/dynamicarray/DynamicArray.java
index fb778357..f6f0276e 100644
--- a/src/main/java/com/thealgorithms/datastructures/dynamicarray/DynamicArray.java
+++ b/src/main/java/com/thealgorithms/datastructures/dynamicarray/DynamicArray.java
@@ -145,7 +145,7 @@ public class DynamicArray<E> implements Iterable<E> {
      * @return Iterator a Dynamic Array Iterator
      */
     @Override
-    public Iterator iterator() {
+    public Iterator<E> iterator() {
         return new DynamicArrayIterator();
     }
 
diff --git a/src/main/java/com/thealgorithms/datastructures/lists/CircleLinkedList.java b/src/main/java/com/thealgorithms/datastructures/lists/CircleLinkedList.java
index 5d9f0b3a..c42b1045 100644
--- a/src/main/java/com/thealgorithms/datastructures/lists/CircleLinkedList.java
+++ b/src/main/java/com/thealgorithms/datastructures/lists/CircleLinkedList.java
@@ -53,7 +53,7 @@ public class CircleLinkedList<E> {
 
     // utility function for traversing the list
     public String toString() {
-        Node p = head.next;
+        Node<E> p = head.next;
         String s = "[ ";
         while (p != head) {
             s += p.value;
@@ -91,7 +91,7 @@ public class CircleLinkedList<E> {
     }
 
     public static void main(String[] args) {
-        CircleLinkedList cl = new CircleLinkedList<String>();
+        CircleLinkedList<Integer> cl = new CircleLinkedList<>();
         cl.append(12);
         System.out.println(cl);
         cl.append(23);
diff --git a/src/main/java/com/thealgorithms/datastructures/lists/CursorLinkedList.java b/src/main/java/com/thealgorithms/datastructures/lists/CursorLinkedList.java
index cefc47c2..22399bd6 100644
--- a/src/main/java/com/thealgorithms/datastructures/lists/CursorLinkedList.java
+++ b/src/main/java/com/thealgorithms/datastructures/lists/CursorLinkedList.java
@@ -134,7 +134,7 @@ public class CursorLinkedList<T> {
     }
 
     private void free(int index) {
-        Node os_node = cursorSpace[os];
+        Node<T> os_node = cursorSpace[os];
         int os_next = os_node.next;
         cursorSpace[os].next = index;
         cursorSpace[index].element = null;
diff --git a/src/main/java/com/thealgorithms/misc/ThreeSumProblem.java b/src/main/java/com/thealgorithms/misc/ThreeSumProblem.java
index 1b72996d..a232ad98 100644
--- a/src/main/java/com/thealgorithms/misc/ThreeSumProblem.java
+++ b/src/main/java/com/thealgorithms/misc/ThreeSumProblem.java
@@ -75,7 +75,7 @@ public class ThreeSumProblem {
 
     public List<List<Integer>> Hashmap(int[] nums, int target) {
         Arrays.sort(nums);
-        Set<List<Integer>> ts = new HashSet();
+        Set<List<Integer>> ts = new HashSet<>();
         HashMap<Integer, Integer> hm = new HashMap<>();
 
         for (int i = 0; i < nums.length; i++) {
@@ -94,6 +94,6 @@ public class ThreeSumProblem {
                 }
             }
         }
-        return new ArrayList(ts);
+        return new ArrayList<>(ts);
     }
 }
diff --git a/src/main/java/com/thealgorithms/searches/UnionFind.java b/src/main/java/com/thealgorithms/searches/UnionFind.java
index d32e4fd3..4dfece0e 100644
--- a/src/main/java/com/thealgorithms/searches/UnionFind.java
+++ b/src/main/java/com/thealgorithms/searches/UnionFind.java
@@ -45,7 +45,7 @@ public class UnionFind {
     }
 
     public int count() {
-        List parents = new ArrayList();
+        List<Integer> parents = new ArrayList<>();
         for (int i = 0; i < p.length; i++) {
             if (!parents.contains(find(i))) {
                 parents.add(find(i));
diff --git a/src/main/java/com/thealgorithms/strings/WordLadder.java b/src/main/java/com/thealgorithms/strings/WordLadder.java
index a4634ce0..e88acbd1 100644
--- a/src/main/java/com/thealgorithms/strings/WordLadder.java
+++ b/src/main/java/com/thealgorithms/strings/WordLadder.java
@@ -51,13 +51,13 @@ class WordLadder {
      * if the endword is there. Otherwise, will return the length as 0.
      */
     public static int ladderLength(String beginWord, String endWord, List<String> wordList) {
-        HashSet<String> set = new HashSet(wordList);
+        HashSet<String> set = new HashSet<>(wordList);
 
         if (!set.contains(endWord)) {
             return 0;
         }
 
-        Queue<String> queue = new LinkedList();
+        Queue<String> queue = new LinkedList<>();
         queue.offer(beginWord);
         int level = 1;