Flex和Bison的相关性难度(Flex and Bison Associativity difficulty)

 这是修改后的代码： 
 
 样本文件： 
 
 @这是一个咒语的描述。 
 
 我经常想知道我经常能经常写这个词。但是我觉得这个经常写出来。 这看起来不是很奇怪。 快速的棕色狐狸跳过小红篱笆。 
 
 @这是对咒语的另一种描述 
 
 苹果是水果。 它是红色的。 
 
 @ 3rd描述 
 
 我有一只宠物。 它是一只名叫约翰的狗。 
 
 @@@ 
 
public static ArrayList<String> descriptions = new ArrayList<String>();

    public static void main(String[] args) throws IOException {

        File filename = new File("C:\\temp\\test.txt");
        loadDescriptions(filename);


        System.out.println("*************");
    for(String ln:descriptions){
        System.out.println(ln);
    }

    }

    public static void loadDescriptions(File name) throws IOException {
        FileReader fr = new FileReader(name);
        BufferedReader br = new BufferedReader(fr);
        StringBuilder sb = new StringBuilder();
        int i = 0;
        String line=null;

        while ((line = br.readLine()) != null ) {

            if(line.startsWith("@")){
                if(i>0){
                 descriptions.add(sb.toString());
                 sb = new StringBuilder();
                }

            }else{
               if(!line.isEmpty()){
                System.out.println(line);
                sb.append(" " + line);
              }
            }


            i++;

        }

    }

here is the modified code:
 
sample file:
 
@This is a description of a spell.
 
I often wonder how often I can write the word often.Without seeming that it is too often that I write this out. Does it not seem weird. The quick brown fox jumps over the small red fence.
 
@This is another description of a spell
 
Apple is fruit. It is red in colour.
 
@3rd description
 
I have a pet. Its a dog named john.
 
@@@
 
public static ArrayList<String> descriptions = new ArrayList<String>();

    public static void main(String[] args) throws IOException {

        File filename = new File("C:\\temp\\test.txt");
        loadDescriptions(filename);


        System.out.println("*************");
    for(String ln:descriptions){
        System.out.println(ln);
    }

    }

    public static void loadDescriptions(File name) throws IOException {
        FileReader fr = new FileReader(name);
        BufferedReader br = new BufferedReader(fr);
        StringBuilder sb = new StringBuilder();
        int i = 0;
        String line=null;

        while ((line = br.readLine()) != null ) {

            if(line.startsWith("@")){
                if(i>0){
                 descriptions.add(sb.toString());
                 sb = new StringBuilder();
                }

            }else{
               if(!line.isEmpty()){
                System.out.println(line);
                sb.append(" " + line);
              }
            }


            i++;

        }

    }