Check if a particular value exists in Java HashMap example
- /*
- Check if a particular value exists in Java HashMap example
- This Java Example shows how to check if HashMap object contains a particular
- value using containsValue method of HashMap class.
- */
- import java.util.HashMap;
- public class CheckValueOfHashMapExample {
- public static void main(String[] args) {
- //create HashMap object
- HashMap hMap = new HashMap();
- //add key value pairs to HashMap
- hMap.put("1","One");
- hMap.put("2","Two");
- hMap.put("3","Three");
- /*
- To check whether a particular value exists in HashMap use
- boolean containsValue(Object key) method of HashMap class.
- It returns true if the value is mapped to one or more keys in the
- HashMap otherwise false.
- */
- boolean blnExists = hMap.containsValue("Two");
- System.out.println("Two exists in HashMap ? : " + blnExists);
- }
- }
- /*
- Output would be
- Two exists in HashMap ? : true
- */
