在Java集合中将字符串与令牌和树集一起使用 [英] Using string to tokens and tree set together in Java collections

问题描述

嗨
我正在做一个使用Java清除垃圾邮件的项目.在这种情况下，我正在使用Java Collections(字符串到令牌).首先，我发送一组邮件(手动添加)，这些邮件是由多个用户(例如:Peter，John，Raf，Sam等)发送的.然后，使用树集，我想创建一个垃圾邮件字典，这将有助于过滤垃圾邮件发送者.

1.如何在单个程序中实现令牌字符串和树集类的字符串

2.垃圾邮件字典(树集)应将名称与第一个程序(字符串到令牌)进行比较，并单独检索垃圾邮件发送者.例如，在第一个程序中，我有Peter，John，Raf和Sam.约翰和山姆是垃圾邮件制造者，我需要显示他们的名字.

3.输出必须为:

发件人列表:Peter，John，Raf，Sam
垃圾邮件发送者列表:John，Sam

请帮助我.

Hi
I am doing a project for spam removal using Java. In that, I am using Java Collections (string to tokens). First, I send a set of mails (adding manually ) which I are sent by multiple users (e.g.: Peter, John, Raf, Sam, etc.). Then, using a tree set, I want to create a spam dictionary and this will help filter the spammers.

1. How can I implement string to tokens and the tree set class in a single program

2. The spam dictionary (tree set) should compare the names with the first program (string to tokens) and retrieve the spammers alone. For example, in the first program I have Peter, John, Raf, and Sam. John and Sam are spammers, and I need to display their names.

3. The output must be:

List of Senders : Peter, John, Raf, Sam
List of Spammers: John, Sam

Please help me.

推荐答案

您可以使用集合将项目加载到其中，然后hashSet非常适合联合和联接:

You can use sets to load the items into and then a hashSet is great for unions and joins:

      String all = "a b c d e f g h i j k l m n";
      String bad = "x k c d";

      Set<string> allSet = new java.util.HashSet<string>(
            Arrays.asList(all.split(" ")));
      Set<string> badSet = new java.util.HashSet<string>(
            Arrays.asList(bad.split(" ")));
      Set<string> allBad = new HashSet<string>(allSet);
      allBad.retainAll(badSet);

      System.out.println(allSet);
      System.out.println(badSet);
      System.out.println(allBad);
</string></string></string></string></string></string>

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