LinkedList boolean addAll(int index，Collection c)方法 (LinkedList boolean addAll(int index, Collection c) method)

• This method is available in package java.util.Collection and here, Collection is an interface.

  該方法在java.util.Collection包中可用，在這里， Collection是一個接口。

• In this method, the index is the position where we have to start inserting the Collection elements and Collection is the list of elements whether Collection is of ArrayList, LinkedList type, etc.

  在此方法中，索引是我們必須開始插入Collection元素的位置，而Collection是元素列表，無論Collection是ArrayList，LinkedList類型還是其他類型。

• This method is used to insert the collection of objects at the specified position in the linked list.

  此方法用于在鏈接列表的指定位置插入對象的集合。

• Index position starts from 0.

  索引位置從0開始。

Syntax:

句法：

boolean addAll(int index , Collection c){}

Parameter(s):

參數：

We can pass two arguments as a parameter in the method and the Collection parameter is the collection of elements will add from the starting position of the specified index in the linked list.

我們可以在方法中傳遞兩個參數作為參數，而Collection參數是將從鏈表中指定索引的起始位置開始添加的元素集合。

Return value:

返回值：

The return type of this method is boolean that means this method returns true during execution of at least inserting of one element.

該方法的返回類型為布爾值 ，這意味著該方法在至少插入一個元素的過程中返回true。

Java程序演示LinkedList addAll(int index，Collection c)方法的示例 (Java program to demonstrate example of LinkedList addAll(int index, Collection c) method)

import java.util.LinkedList; import java.util.ArrayList;public class LinkList {public static void main(String args[]) {// Creating a LinkedList LinkedList list = new LinkedList();// Use add() method to add objects // in the LinkedListlist.add("J");list.add("A");list.add("V");list.add("A");// Creating a Collection ArrayList object // of ArrayList TypeArrayList al = new ArrayList();al.add("P");al.add("R");al.add("O");al.add("G");al.add("R");al.add("A");al.add("M");al.add("M");al.add("I");al.add("N");al.add("G");// Displaying the Current LinkedList System.out.println("The Current LinkedList is: " + list);// Appending the collection ArrayList to the // LinkedList and ArrayList will start inserting // from index 4(i.e. From Fifth Position )list.addAll(4, al);// Displaying the new LinkedListSystem.out.println("The new linked list is: " + list);} }

Output

輸出量

D:\Programs>javac LinkList.javaD:\Programs>java LinkList The Current LinkedList is: [J, A, V, A] The new linked list is: [J, A, V, A, P, R, O, G, R, A, M, M, I, N, G]

翻譯自: https://www.includehelp.com/java/linkedlist-boolean-addall-int-index-collection-c-method-with-example.aspx

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