java - 我怎样才能把它变成一个循环？

Question

用 Java 编写 LSH 程序，在第一部分中，我阅读了 5 个不同的文本文件并提取了所有独特的单词。然后创建了 5 种不同的单词洗牌方式。现在，我想出的代码显然可以工作，但我知道每当您多次复制粘贴相同的代码块时，您通常可以使用循环来更干净地完成它。在这种情况下，我只是不知道该怎么做。我觉得按照我的方式去做是不好的做法，所以将来我很想避免这种情况。有人能帮我弄清楚如何循环 Java 变量名吗？ (或一些类似的复制/粘贴代码块的修复，如下所示)

更新:我需要能够稍后在程序中访问每个唯一打乱顺序的列表，因此我不能简单地将其放入迭代 5 次覆盖前一个列表的 for 循环中。

我也不需要输出列表，这只是为了测试随机播放，抱歉，不清楚。我更新了我的评论。

import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;


public class LSH {

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

        //Find all unique words in the Files in dir /filestxt
        HashSet words = new HashSet();
        File dir = new File("filestxt");
        for (File f : dir.listFiles()) {
            Scanner in = new Scanner(f);

            while(in.hasNextLine()) {
                String line = in.nextLine();
                words.add(line);
            }//end while
        }//end for

        //Create 5 different shufflings of the words
        LinkedList shuffle1 = new LinkedList();
        LinkedList shuffle2 = new LinkedList();
        LinkedList shuffle3 = new LinkedList();
        LinkedList shuffle4 = new LinkedList();
        LinkedList shuffle5 = new LinkedList();
        for (Object s : words) {
            shuffle1.add(s.toString());
        }//end for
        for (Object s : words) {
            shuffle2.add(s.toString());
        }//end for
        for (Object s : words) {
            shuffle3.add(s.toString());
        }//end for
        for (Object s : words) {
            shuffle4.add(s.toString());
        }//end for
        for (Object s : words) {
            shuffle5.add(s.toString());
        }//end for
        Collections.shuffle(shuffle1);
        Collections.shuffle(shuffle2);
        Collections.shuffle(shuffle3);
        Collections.shuffle(shuffle4);
        Collections.shuffle(shuffle5);

        //This block for testing purposes only
        System.out.println(shuffle1);
        System.out.println(shuffle2);
        System.out.println(shuffle3);
        System.out.println(shuffle4);
        System.out.println(shuffle5);

    }//end main

}

Answer 1

public static void main(String[] args) throws FileNotFoundException {
    HashSet<String> words = new HashSet<String>();
    File dir = new File("filestxt");
    for (File f : dir.listFiles()) {
        Scanner in = new Scanner(f);
        while(in.hasNextLine()) {
            words.add(in.nextLine());
        }//end while
    }//end for

    //Create 5 different shufflings of the words
    for (int i = 0; i < 5; i++) {
        List<String> shuffle = new ArrayList<String>();
        for (String s : words) {
            shuffle.add(s);
        }//end for
        Collections.shuffle(shuffle);
        System.out.println(shuffle);
     }
}

编辑:如果您想稍后访问它，请在进入循环之前声明一个变量

    //Create 5 different shufflings of the words
    List<ArrayList<String>> listOlists = new ArrayList<ArrayList<String>>();
    for (int i = 0; i < 5; i++) {
        ArrayList<String> shuffle = new ArrayList<String>();
        for (String s : words) {
            shuffle.add(s);
        }//end for
        Collections.shuffle(shuffle);
        listOlists.add(shuffle);
        System.out.println(shuffle);
    }
    //access it later
    for (List<String> arrayList : listOlists) {
        System.out.println(arrayList);
    }