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                # 將`HashSet`轉換為`List` / `ArrayList` > 原文: [https://beginnersbook.com/2014/08/convert-hashset-to-a-list-arraylist/](https://beginnersbook.com/2014/08/convert-hashset-to-a-list-arraylist/) 在本教程中,我們將學習如何將`HashSet`轉換為`List`(`ArrayList`)。 #### 程序 這里我們有一個`String`元素的`HashSet`,我們通過將`HashSet`的所有元素復制到`ArrayList`來創建一個`String`的`ArrayList`。以下是完整的代碼: ```java import java.util.HashSet; import java.util.List; import java.util.ArrayList; class ConvertHashSetToArrayList{ public static void main(String[] args) { // Create a HashSet HashSet<String> hset = new HashSet<String>(); //add elements to HashSet hset.add("Steve"); hset.add("Matt"); hset.add("Govinda"); hset.add("John"); hset.add("Tommy"); // Displaying HashSet elements System.out.println("HashSet contains: "+ hset); // Creating a List of HashSet elements List<String> list = new ArrayList<String>(hset); // Displaying ArrayList elements System.out.println("ArrayList contains: "+ list); } } ``` **輸出:** ```java HashSet contains: [Tommy, Matt, Steve, Govinda, John] ArrayList contains: [Tommy, Matt, Steve, Govinda, John] ```
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