anoterCode

HashMapAmazon.java

@@ -0,0 +1,14 @@
+import java.util.HashMap;
+
+public class HashMapAmazon {
+  public static void main(String[] args) {
+    int[] ar = { 3, 4, 4, 4, 3, 3, 3, 3, 6, 6, 6, 6, 1, 1, 1, 1, 9 };
+    HashMap<Integer, Integer> elementCount = new HashMap<>();
+    for (int i : ar) {
+      elementCount.put(i, elementCount.getOrDefault(i, 0) + 1);
+    }
+    for (Integer key : elementCount.keySet()) {
+      System.out.println("Element: " + key + " Count: " + elementCount.get(key));
+    }
+  }
+}