Java映射问题

Question

基本上，该程序应该搜索文本文件并查找出现的不同单词的数量，然后将它们存储在数组中，然后向用户显示单词和次数。我尝试使用map类，但由于它不会显示结果而未能成功。所以我想知道是否有人知道我可以修复此文件的其他方式：

public class WordStats {


public static void main(String[] args) {
    File textFile = new File("words.txt");
    FileReader in;
    BufferedReader readFile;
    char charInFile;
    String newWord = "";
    String map=new String();
    String existingMap=new String();
    int wordIndex, index = 0;
    ArrayList wordList = new ArrayList();

    /* navigating the file */
    try{
        in = new FileReader(textFile);
        readFile = new BufferedReader(in);
    do{
        charInFile = (char)readFile.read();
        if(charInFile >= 'a' && charInFile <= 'z'){
            while(charInFile >= 'a' && charInFile <= 'z'){
                newWord += charInFile;
                charInFile = (char)readFile.read();
            }//end of while
            wordIndex = wordList.indexOf(map);
            if(wordIndex > -1){
            existingMap = (String) wordList.get(wordIndex);

             //existingMap.addOccurrence();

             wordList.set(wordIndex, existingMap);
            } else {
                index = 0;

            } 
            if(wordList.size() > 0){
                do{
                    existingMap = (String) wordList.get(index);
                    index += 1;
                }while(existingMap.compareTo(map) <= 0 && index < 
wordList.size());
                wordList.add(index-1, map);
            }else{
                wordList.add(map);
            }

        }//end of if
        newWord = "";
    }while(charInFile != (char)-1);

    System.out.println("Word\t\tOccurrences");

        for(Object Word : wordList){
            System.out.println(Word);
        }
        readFile.close();
        in.close();
    }catch(FileNotFoundException e){
        System.out.println("file could not be found.");
        System.err.println("FileNotFoundException: " + e.getMessage());
    }catch(IOException e){
        System.out.println("problem reading the file.");
        System.err.println("IOException: " + e.getMessage());
    }
  }
}