Java opens a text document and counts the number of occurrences of a word.

public class WordEntity implements Comparable<WordEntity>{
	@Override
	public int compareTo(WordEntity o) {
		int cmp = count.intValue() - o.count.intValue();
		return (cmp == 0 ? key.compareTo(o.key) : -cmp);
		//Just add a negative sign here to decide whether to sort ascending or descending - cmp descending, cmp ascending
		//Because TreeSet will call the compareTo method of WorkForMap to determine its own sorting
	}

	private String key;
	private Integer count;

	public WordEntity ( String key,Integer count) {
		this.key = key;
		this.count = count;
	}

	public WordEntity(){

	}

	@Override
	public String toString() {
		The number of occurrences of return key + " is: " + count;
	}

	public String getKey() {
		return key;
	}

	public Integer getCount() {
		return count;
	}
}

import java.io.BufferedReader;  
import java.io.FileNotFoundException;  
import java.io.FileReader;  
import java.io.IOException;  
import java.util.HashMap;  
import java.util.Iterator;  
import java.util.Map;  
import java.util.Set;  
import java.util.StringTokenizer;  
import java.util.TreeMap;  
import java.util.TreeSet;  

public class WordCont {  
  
    public void displayWordCount(String fileName){  
        //Character statistics  
        try {  
            BufferedReader reader = new BufferedReader(new FileReader(fileName));  
            String line = null;  
            TreeMap<String,Integer> tm = new TreeMap<String,Integer>();  
              
            while((line=reader.readLine())!=null){  
                String str[] = line.split("\\s+");  
                for(int i = 0; i<str.length; i++){  
                    String word = str[i].trim();  
                    if(tm.containsKey(word)){  
                        tm.put(word, tm.get(word)+1);  
                    }else{  
                        tm.put(word, 1);  
                    }  
                }  
            }  
            // output the string format we want  
            System.out.println("Word=Occurrences");  
            Iterator iterator=tm.entrySet().iterator();  
            while(iterator.hasNext())  
            {  
                System.out.println(" "+iterator.next());  
            }  
              
        } catch (FileNotFoundException e) {  
            e.printStackTrace ();  
        }catch (IOException e) {  
            e.printStackTrace ();  
        }  
     }  
}  

import java.util.Scanner;

public class Test {

	public static void main(String[] args) {
		System.out.println("ÊäÈëÎļþ·¾¶£º\n");			
		Scanner in=new Scanner(System.in);
		String line=in.nextLine();
		String fileName= line.trim();
		WordCont wc = new WordCont();
		wc.displayWordCount(fileName);
		
	}

}