import java.util.*;
import java.io.*;

public class CountWords	// class to count the number of unique words in a file using a map class (HashMap)
{	
	public static void main(String[] args)
	{
		String filename;
		HashMap<String,Integer> map=new HashMap<>();	// our HashMap will store the word as the key and the number of 
		String temp;									// occurrences as the value, this will have to be an Integer
		char lastChar;			// used to prune off the last character if it is a punctuation
		Integer i;				// temp Integer variable used when increment the count by 1
		try {
			Scanner in1=new Scanner(System.in);				// keyboard input to get the filename
			System.out.print("Enter the file name:  ");
			filename=in1.next();
			Scanner in2=new Scanner(new File(filename));	// file input
			while(in2.hasNext())							// read the file one String at a time
			{
				temp=in2.next().toLowerCase();				// get the next String, lower case it
				lastChar=temp.charAt(temp.length()-1);		// get the last character
				if(lastChar=='.'||lastChar==',')			// if punctuation then prune it off of temp
					temp=temp.substring(0,temp.length()-1);
				if(map.containsKey(temp))					// is temp already in the map?
				{		
					i=map.get(temp);						// if so, get ahold of this entry's value (an Integer)
					i=new Integer(i.intValue()+1);			// and create a new Integer that is 1 greater
					map.put(temp,i);						// if temp is already in the map, this replaces it, thus
				}											// replacing temp,i with temp,i+1
				else 
				{
					map.put(temp,new Integer(1));			// otherwise temp is new, insert it with a count of 1
				}
			}
			System.out.println(map);						// output the map when done
		}
		catch(IOException e)								// needed if the file does not exist or is
		{													// corrupted
			System.out.println(e);
		}
	}
}