diff --git a/src/WordFrequency.java b/src/WordFrequency.java
index 2f82ee4..70285c2 100644
--- a/src/WordFrequency.java
+++ b/src/WordFrequency.java
@@ -1,5 +1,67 @@
+import java.lang.constant.Constable;
+import java.util.*;
+import java.io.*;
+
 public class WordFrequency {
-    public static void main(String[] args) {
-        System.out.println("Hello world!");
+    public static void main(String[] args){
+        String file1 = "tinyTale.txt";
+        String file2 = "tale.txt";
+
+        //This method will print out all word and appeared time in the file
+        eachWordCount(file1);
+        eachWordCount(file2);
+        //This will print out the most frequent word in the files
+        System.out.println(mostAppearWord(file1));
+        System.out.println(mostAppearWord(file2));
+    }
+    public static Map<String, Integer> countWords(String fileName){
+
+        Map<String, Integer> wordCounts = new TreeMap<>();
+        try {
+            Scanner scanner = new Scanner(new File(fileName));
+            while (scanner.hasNext()) {
+                String line = scanner.nextLine();
+                String[] words = line.toLowerCase().trim().split("[\\W\\d]+");
+                for (String word : words) {
+                    if (!word.isEmpty()) { // ignore empty strings
+                        if (!wordCounts.containsKey(word)) {
+                            wordCounts.put(word, 1);
+                        } else {
+                            wordCounts.put(word, wordCounts.get(word) + 1);
+                        }
+                    }
+                }
+            }
+        } catch (FileNotFoundException e) {
+            System.out.println("File not found: " + fileName);
+        }
+        return wordCounts;
+    }
+    public static String mostAppearWord(String fileName){
+        Map<String, Integer> wordCounts = countWords("333/WordFrequency/" + fileName);
+        int mostAppeared = 0;
+        String wordMostAppear = "";
+        for (Map.Entry<String, Integer> entry : wordCounts.entrySet()) {
+            if (entry.getValue() > mostAppeared) {
+                mostAppeared = entry.getValue();
+                wordMostAppear = entry.getKey();
+            }
+        }
+        return "The word \"" + wordMostAppear + "\" is the most appeared in " + fileName + " file with " + mostAppeared + " times.";
+    }
+
+    public static void eachWordCount(String fileName){
+        Map<String, Integer> wordsCount = countWords("333/WordFrequency/" + fileName);
+        System.out.println(fileName + " file has: ");
+        for (Map.Entry<String, Integer> entry : wordsCount.entrySet()) {
+            String time = "";
+            if (entry.getValue() == 1) {
+                time = " time.";
+            } else {
+                time = " times.";
+            }
+            System.out.println("The word \"" + entry.getKey() + "\" appeared " + entry.getValue() + time);
+        }
+        System.out.println("-----------------------------------------------------------------------------------");
     }
 }
\ No newline at end of file