Create HashMapSize.java

janbodnar · web-flow · commit b01bae02d3ab · 2019-07-13T11:59:28.000+02:00
diff --git a/collections/hashmap/HashMapSize.java b/collections/hashmap/HashMapSize.java
@@ -0,0 +1,30 @@
+package com.zetcode;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class HashMapSize {
+
+    public static void main(String[] args) {
+
+        Map<String, String> capitals = new HashMap<>();
+
+        capitals.put("svk", "Bratislava");
+        capitals.put("ger", "Berlin");
+        capitals.put("hun", "Budapest");
+        capitals.put("czk", "Prague");
+        capitals.put("pol", "Warsaw");
+        capitals.put("ita", "Rome");
+
+        int size = capitals.size();
+
+        System.out.printf("The size of the HashMap is %d%n", size);
+
+        capitals.remove("pol");
+        capitals.remove("ita");
+
+        size = capitals.size();
+
+        System.out.printf("The size of the HashMap is %d%n", size);
+    }
+}
