Set集合

在 Java 中，Set 集合的特点是元素不重复，且无序（HashSet）。如果用 Set 存储这些单词答案，有两种实现方式，下面是具体代码：

方式1：使用 HashSet 存储纯单词

适合仅存储不重复的单词内容，不关联题号

import java.util.HashSet;

import java.util.Set;

public class WordSetDemo1 {

public static void main(String[] args) {

Set<String> wordSet = new HashSet<>();

// 添加题目中的单词

wordSet.add("diverse");

wordSet.add("wide");

wordSet.add("especially");

wordSet.add("insulting");

wordSet.add("disposition");

wordSet.add("message");

wordSet.add("inadvertently");

wordSet.add("visitor");

wordSet.add("distressed");

wordSet.add("understood");

// 遍历输出所有单词

for (String word : wordSet) {

System.out.println(word);

}

}

}

方式2：存储自定义对象（题号+单词+释义）

如果需要关联完整信息，要让自定义类重写 equals() 和 hashCode() 保证元素唯一性

import java.util.HashSet;

import java.util.Objects;

import java.util.Set;

// 自定义单词信息类

class WordData {

private int num;

private String word;

private String meaning;

public WordData(int num, String word, String meaning) {

this.num = num;

this.word = word;

this.meaning = meaning;

}

// 重写equals和hashCode，确保按num判断唯一性

@Override

public boolean equals(Object o) {

if (this == o) return true;

if (o == null || getClass() != o.getClass()) return false;

WordData wordData = (WordData) o;

return num == wordData.num;

}

@Override

public int hashCode() {

return Objects.hash(num);

}

@Override

public String toString() {

return "第" + num + "空：" + word + "（" + meaning + "）";

}

}

public class WordSetDemo2 {

public static void main(String[] args) {

Set<WordData> wordDataSet = new HashSet<>();

// 添加带完整信息的对象

wordDataSet.add(new WordData(1, "diverse", "多样的；不同的"));

wordDataSet.add(new WordData(2, "wide", "广泛的；宽阔的"));

wordDataSet.add(new WordData(3, "especially", "尤其；特别"));

wordDataSet.add(new WordData(4, "insulting", "侮辱的；无礼的"));

wordDataSet.add(new WordData(5, "disposition", "性情；性格"));

wordDataSet.add(new WordData(6, "message", "信息；消息"));

wordDataSet.add(new WordData(7, "inadvertently", "无意地；不经意地"));

wordDataSet.add(new WordData(8, "visitor", "访客；游客"));

wordDataSet.add(new WordData(9, "distressed", "苦恼的；心烦的"));

wordDataSet.add(new WordData(10, "understood", "理解；明白（过去分词）"));

// 遍历输出

for (WordData data : wordDataSet) {

System.out.println(data);

}

}

}