Java program to print the nodes.

Utkarsh1520 · web-flow · commit 997fb8ae382f · 2020-10-16T14:45:59.000+05:30
diff --git a/HashMap.java b/HashMap.java
@@ -0,0 +1,48 @@
+import java.util.HashMap;
+import java.util.Map;
+ 
+public class Hashmap
+{
+public static void main(String[] args)
+{
+HashMap<String, Integer> map = new HashMap<>();
+print(map);
+map.put("abc", 10);
+map.put("mno", 30);
+map.put("xyz", 20);
+ 
+System.out.println("Size of map is" + map.size());
+ 
+print(map);
+if (map.containsKey("abc"))
+{
+Integer a = map.get("abc");
+System.out.println("value for key \"abc\" is:- " + a);
+}
+map.clear();
+print(map);
+}
+public static void print(Map<String, Integer> map)
+{
+if (map.isEmpty())
+{
+System.out.println("map is empty");
+}
+else
+{
+System.out.println(map);
+}
+}
+}
+On executing the HashMap program, output goes like this:
+
+1
+2
+3
+4
+5
+map is empty
+Size of map is:- 3
+{abc=10, xyz=20, mno=30}
+value for key "abc" is:- 10
+map is empty
