I need help to create this method/class

Question

the code is:
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Scanner;
public class words { 
       public static ArrayList<String> readFileIntoString() {
          ArrayList<String> wordList = new ArrayList<String>();
         Scanner scanner = null;
         try {
           scanner = new Scanner(new File("BoggleWords"));
         } catch (FileNotFoundException e) {
           // TODO Auto-generated catch block
           e.printStackTrace();
         // Read all lines in newFile(filename) and append
         // then to the one big StringBuffer object.
         while (scanner.hasNextLine()) {
           wordList.add(scanner.nextLine().toUpperCase());
         return wordList;
}these assertions should all pass:
assertEquals(81055, words.size());
assertTrue(words.contains("PARENT"));
assertTrue(words.contains("TREE"));
assertFalse(words.contains("tree"));
the instruction of this task is:
Complete a Dictionary with one static method (no object required) that returns acollection of strings where all words must be in uppercase. We will use the file BoggleWords, a file of 81,055 words many people believe are spelled correctly.
where did I fail this??

Answer 1

assertEquals(81055, words.size()); size()
assertTrue(words.contains("PARENT")); contains()
assertTrue(words.contains("TREE"));
assertFalse(words.contains("tree"));You must write these methods.