Java中的 AbstractSequentialList addAll() 方法及示例

AbstractSequentialList的addAll(int index, Collection C)方法用于将作为参数传递给此函数的集合中的所有元素附加到抽象顺序列表的特定索引或位置。

句法：

boolean addAll(int index, Collection C)

参数：此函数接受两个参数，如上述语法所示，如下所述。

• index ：此参数是整数数据类型，并指定列表中的位置，从容器中的元素将被插入的位置开始。
• C : 它是一个需要附加元素的集合。

返回值：如果执行了至少一个附加操作，则该方法返回 TRUE。

下面的程序说明了Java.util.AbstractSequentialList.addAll() 方法：

示例 1：

// Java code to illustrate addAll() method
  
import java.util.*;
import java.util.AbstractSequentialList;
  
public class AbstractSequentialListDemo {
    public static void main(String args[])
    {
  
        // Creating an empty AbstractSequentialList
        AbstractSequentialList
            absqlist = new LinkedList();
  
        // Use add() method to add elements
        absqlist.add("Geeks");
        absqlist.add("for");
        absqlist.add("Geeks");
        absqlist.add("10");
        absqlist.add("20");
  
        // Creating a Collection
        Collection
            collect = new ArrayList();
        collect.add("A");
        collect.add("Computer");
        collect.add("Portal");
        collect.add("for");
        collect.add("Geeks");
  
        // Displaying the list
        System.out.println("AbstractSequentialList: "
                           + absqlist);
  
        // Appending the collection to the list
        absqlist.addAll(1, collect);
  
        // Clearing the list using clear() and displaying
        System.out.println("The new list is: "
                           + absqlist);
    }
}

输出：

AbstractSequentialList: [Geeks, for, Geeks, 10, 20]
The new list is: [Geeks, A, Computer, Portal, for, Geeks, for, Geeks, 10, 20]

示例 2：

// Java code to illustrate boolean addAll()
  
import java.util.*;
import java.util.AbstractSequentialList;
  
public class AbstractSequentialListDemo {
    public static void main(String args[])
    {
  
        // Creating an empty AbstractSequentialList
        AbstractSequentialList
            absqlist = new LinkedList();
  
        // Use add() method to add elements
        absqlist.add(10);
        absqlist.add(20);
        absqlist.add(30);
        absqlist.add(10);
        absqlist.add(20);
  
        // Creating a Collection
        Collection
            collect = new LinkedList();
        collect.add(1);
        collect.add(2);
        collect.add(3);
        collect.add(4);
        collect.add(5);
  
        // Displaying the list
        System.out.println("The AbstractSequentialList is: "
                           + absqlist);
  
        // Appending the collection to the list
        absqlist.addAll(1, collect);
  
        // Clearing the list using clear() and displaying
        System.out.println("The new list is: " + absqlist);
    }
}

输出：

The AbstractSequentialList is: [10, 20, 30, 10, 20]
The new list is: [10, 1, 2, 3, 4, 5, 20, 30, 10, 20]