import java.util.HashMap;

public class CheckIfAParticularValue {

public static void main(String[] args) {
    // TODO Auto-generated method stub
     HashMap hMap = new HashMap();
        hMap.put("1","One");
        hMap.put("2","Two");
        hMap.put("3","Three");
       
        boolean blnExists = hMap.containsValue("Two");
        System.out.println("Two exists in HashMap ? : " + blnExists);
}

}
Console：
Two exists in HashMap ? : true