Hash Map

Core Java/HashMapSet.java

+import java.util.HashMap;
+import java.util.HashSet;
+public class HashMapSet{
+	public static void main(String[] args){
+		System.out.println("----HashMap----");
+		HashMap<String,Integer> hashmap_obj = new HashMap<String,Integer>();
+		hashmap_obj.put("One",1);
+		hashmap_obj.put("Two",2);
+		hashmap_obj.put("Three",3);
+		hashmap_obj.put("Four",4);
+		hashmap_obj.put("Five",5);
+		System.out.println(hashmap_obj);
+		//looping hash map
+		for(String i:hashmap_obj.keySet()){
+			System.out.println("Key : "+i+", Values : "+hashmap_obj.get(i));
+		}
+		System.out.println(hashmap_obj.get("One"));
+		//hashmap_obj.set("One",22);//throw error set property not allowed
+		System.out.println("Size : "+hashmap_obj.size());
+		//Hash set is same as otherss, nothing big different
+	}
+}
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