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                # Java `ArrayList addAll(int index, Collection c)`方法 > 原文: [https://beginnersbook.com/2013/12/java-arraylist-addall-int-index-collection-c-method-example/](https://beginnersbook.com/2013/12/java-arraylist-addall-int-index-collection-c-method-example/) 在上一個教程中,我們共享了[`addAll(Collection c)`方法](https://beginnersbook.com/2013/12/java-arraylist-addallcollection-c-method-example/)的示例,該方法用于在列表末尾添加`Collection c`的所有元素。在這里,我們將看到另一個變體`add(int index, Collection c)`,它在列表的指定索引處添加`c`的所有元素。 `public boolean addAll(int index, Collection c)` ### 例 在這個例子中,我們有兩個`String`類型的`ArrayList`,我們在第一個`arraylist`的第 3 個位置(`index = 2`)添加第二個`arraylist`的元素。 ```java package beginnersbook.com; import java.util.ArrayList; public class ExampleOfaddAllMethod { public static void main(String[] args) { // ArrayList1 ArrayList<String> al = new ArrayList<String>(); al.add("Apple"); al.add("Orange"); al.add("Grapes"); al.add("Mango"); System.out.println("ArrayList1 before addAll:"+al); //ArrayList2 ArrayList<String> al2 = new ArrayList<String>(); al2.add("Fig"); al2.add("Pear"); al2.add("Banana"); al2.add("Guava"); System.out.println("ArrayList2 content:"+al2); //Adding ArrayList2 in ArrayList1 at 3rd position(index =2) al.addAll(2, al2); System.out.println("ArrayList1 after adding ArrayList2 at 3rd Pos:\n"+al); } } ``` 輸出: ```java ArrayList1 before addAll:[Apple, Orange, Grapes, Mango] ArrayList2 content:[Fig, Pear, Banana, Guava] ArrayList1 after adding ArrayList2 at 3rd Pos: [Apple, Orange, Fig, Pear, Banana, Guava, Grapes, Mango] ``` #### 參考: [`addAll(int, Collection)`](https://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html#addAll(int, java.util.Collection))
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