How to find the most frequent word in an array of strings

// Java program
import java.util.*; 

class MostFrequentWord 
{ 
  // Function to calculate the most frequent word in the array.
	public static void FrequentWord(String array[]) 
	{ 
		// Insert all unique strings and update count if a string is not unique.
		Map<String,Integer> hshmap = new HashMap<String, Integer>(); 
		for (String str : array) 
		{ 
			if (hshmap.keySet().contains(str)) // if already exists then update count. 
				hshmap.put(str, hshmap.get(str) + 1); 
			else
				hshmap.put(str, 1); // else insert it in the map.
		} 
    	// Traverse the map for the maximum value.
		String maxStr = ""; 
    	int maxVal = 0; 
		for (Map.Entry<String,Integer> entry : hshmap.entrySet()) 
		{ 
			String key = entry.getKey(); 
			Integer count = entry.getValue(); 
			if (count > maxVal) 
			{ 
				maxVal = count; 
				maxStr = key; 
			} 
      		// Condition for the tie.
			else if (count == maxVal){ 
				if (key.length() < maxStr.length())
					maxStr = key; 
			}
		} 
		System.out.println("Most frequent word: "+ maxStr);
		System.out.println("Count: "+ maxVal); 
	} 

	// Main
	public static void main(String[] args) 
	{ 
	  String[] arr = { "Batman", "Thor", "Batman" , "Flash", "Batman" }; 
	  FrequentWord(arr); 
	} 
}