Search a value for a given key in a HashMap

Question

How do you search for a key in a HashMap? In this program, when the user enters a key the code should arrange to search the hashmap for the corresponding value and

Answer 1

To decalare the hashMap use this:

 HashMap hm=new HashMap();

To enter the elements in the HashMap:

 hm.put(1,"January");
 hm.put(2,"Febuary");

before searching element first check that the enter number is present in the hashMap for this use the method containsKey() which will return a Boolean value:

 if(hm.containsKey(num))
 {
    hm.get(num);
 }