How to Search key in HashMap Java

import java.util.HashMap;
import java.util.Map;

public class HashMapSearchKey {
public static void main(String[] args) {

Map<Integer,String> hm = new HashMap<Integer,String>();

/*
* Associates the specified value with the specified key in
this map (optional operation). If the map previously
contained a mapping for the key, the old value is
replaced by the specified value
*/
hm.put(1,”ankush”);
hm.put(2, “amit”);
hm.put(3,”shivam”);
hm.put(4,”ankit”);
hm.put(5, “yogesh”);

/*
* Returns true if this map contains a
*  mapping for the specified key
*/

System.out.println(“key  1   =”+hm.containsKey(1));
System.out.println(“key  20  =”+hm.containsKey(20));
System.out.println(“key 9    =”+hm.containsKey(9));
System.out.println(“key  5   =”+ hm.containsKey(5));

}
}

Output:
key  1   =true

key  20  =false

key 9    =false

key  5   =true

 

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