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                # 如何將`ArrayList`克隆到另一個`ArrayList` > 原文: [https://beginnersbook.com/2013/12/how-to-clone-an-arraylist-to-another-arraylist/](https://beginnersbook.com/2013/12/how-to-clone-an-arraylist-to-another-arraylist/) 在本教程中,我們將學習如何將`ArrayList`克隆到另一個。我們將使用`ArrayList`類的[`clone()`方法](https://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html#clone())來實現我們的目的。 `Object clone()` 此方法返回`ArrayList`實例的淺表副本。 ## `ArrayList`克隆的完整示例 在這個例子中,我們有一個`String`類型的`ArrayList`,我們使用`clone()`方法將它克隆到另一個`ArrayList`。這里有趣的一點是,當我們在`clone()`方法之后添加并刪除了原始`ArrayList`中的一些元素時,克隆的`ArrayList`沒有受到影響。它表明`clone()`方法只返回`ArrayList`的淺表副本。 ```java package beginnersbook.com; import java.util.ArrayList; public class Details { public static void main(String a[]){ ArrayList<String> al = new ArrayList<String>(); //Adding elements to the ArrayList al.add("Apple"); al.add("Orange"); al.add("Mango"); al.add("Grapes"); System.out.println("ArrayList: "+al); ArrayList<String> al2 = (ArrayList<String>)al.clone(); System.out.println("Shallow copy of ArrayList: "+ al2); //add and remove on original ArrayList al.add("Fig"); al.remove("Orange"); //Display of both ArrayLists after add & remove System.out.println("Original ArrayList:"+al); System.out.println("Cloned ArrayList:"+al2); } } ``` 輸出: ```java ArrayList: [Apple, Orange, Mango, Grapes] Shallow copy of ArrayList: [Apple, Orange, Mango, Grapes] Original ArrayList:[Apple, Mango, Grapes, Fig] Cloned ArrayList:[Apple, Orange, Mango, Grapes] ```
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