Create MyHashSet class with basic operations

Implemented a custom HashSet class with add, remove, and contains methods.

Author: harshithasudhakar

Arrays/MyHashSet.java

@@ -0,0 +1,45 @@
+class MyHashSet { // Design a  HashSet without a HashSet
+
+    List<Integer> set;
+    
+    public MyHashSet() {
+        set = new ArrayList<>();
+    }
+    
+    public void add(int key) {
+        for(int i = 0; i<set.size(); i++){
+            if(key == set.get(i)){
+                return;
+            }
+        }
+
+        set.add(key);
+    }
+    
+    public void remove(int key) {
+        
+        if(set.size() == 0){
+            return;
+        }
+
+        set.remove(Integer.valueOf(key));
+    }
+    
+    public boolean contains(int key) {
+        for(int i = 0; i<set.size(); i++){
+            if(key == set.get(i)){
+                return true;
+            }
+        }
+
+        return false;
+    }
+}
+
+/**
+ * Your MyHashSet object will be instantiated and called as such:
+ * MyHashSet obj = new MyHashSet();
+ * obj.add(key);
+ * obj.remove(key);
+ * boolean param_3 = obj.contains(key);
+ */