PrintWriter不会停止用Java编写，卡在无限循环中

Question

这段代码是我编写的程序的一部分，这是一本使用向量的联系簿，用于我目前在本学期的数据结构类。在写入另一个从文件中读取的方法之前，我对写入文件没有任何问题。使用此代码，它会反复写入数组的内容而没有结束。即使我退出该计划，它仍将继续写作。到达某条线并重新启动。我把read from file方法作为参考，包括问题就在那里。

public void writeFinalToFile() {
    try {
        FileWriter fw = new FileWriter("file.txt");
        PrintWriter pw = new PrintWriter(fw);
        for (int x=0; x<size; x++) {
            pw.println(people[x].toString());
        }
        pw.close(); 
        fw.close();
    } catch (IOException e) {
        System.out.println("Can not write file?1?");
        return;
    }
}

public void readInitialFromFile() {
    String str;
    String[] pieces;
    Scanner in =null;
    Contact c;

    try {
        in = new Scanner(new File("file.txt")); 
    } catch(IOException e) {
        System.out.println("File not found");
    }

    while (in.hasNext()) {
        str = in.nextLine();
        pieces = str.split(":");
        c = new Contact();
        c.setName(pieces[0]);
        c.setNum(Long.parseLong(pieces[1].trim()));
        c.setComment(pieces[2]);
        addContact(c);
    }
}

示例输出： vrezh:8182645322:me arthur:8183252314:brother vrezh:8182645322:me arthur:8183252314:brother

永远......在这种情况下，我只在数组中输入了两个元素

按请求添加联系方式

 public void addContact(Contact c)
{
       if (size==capacity) {
              Contact[] tmp = new Contact[capacity+5];
              capacity += 5;
              for (int i=0; i<size; i++)
                 tmp[i] = people[i];
              people = tmp;
          }
          people[size++] = c;
       }

这是主要的我称之为readInitialFromFile（）;一旦用户决定退出，我就会写下FinalFoFile的底部。

    public static void main(String [] args){

    String entry;
    long phone;

    Scanner input = new Scanner(System.in);
    Scanner input1 = new Scanner(System.in);

    System.out.println("Welcome to Contact Book");
    System.out.println("Would you like to use a vector or an ordered vector?");
    entry = input.next();
    if (entry.contentEquals("vector"))
    {
        VectorOfContacts newVector = new VectorOfContacts(); 
        Contact newContact;
        newVector.readInitialFromFile();

        while (!(entry.contentEquals("quit"))){
        System.out.println("Please enter your command:");
        entry = input.next();

        if (entry.contentEquals("add"))
        {
            newContact = new Contact();
            System.out.println("Name?");
            entry = input.next();
            newContact.setName(entry);
            System.out.println("Phone number?");
            phone = input1.nextLong();
            newContact.setNum(phone);
            System.out.println("Contact?");
            entry = input.next();
            newContact.setComment(entry);

            newVector.addContact(newContact);

        }

    else if (entry.contentEquals("quit"))
        {
            System.out.println("Writing to file ...");
            newVector.writeFinalToFile();
        }
     }