Add RemoveStars and ComplexNumberMultiply string algorithms

Author: SYEDMDSAAD

src/main/java/com/thealgorithms/strings/RemoveStars.java

@@ -0,0 +1,36 @@
+package com.thealgorithms.strings;
+
+/**
+ * Removes characters affected by '*' in a string.
+ * Each '*' deletes the closest non-star character to its left.
+ *
+ * Example:
+ * Input: leet**cod*e
+ * Output: lecoe
+ */
+
+public final class RemoveStars {
+
+    private RemoveStars() {
+        // Private constructor to prevent instantiation(object creation)
+    }
+
+    public static String removeStars(String s) {
+        StringBuilder result = new StringBuilder();
+         
+        for (char c : s.toCharArray()) {
+            if (c == '*') {
+                if (result.length() > 0) {
+                    result.deleteCharAt(result.length() - 1);
+                }
+            } else {
+                result.append(c);
+            }
+        }
+        return result.toString();
+    }
+    public static void main(String[] args) {
+        String example = "leet**cod*e";
+        System.out.println(removeStars(example));
+    }
+}