Java 中的抽象顺序列表添加所有()方法，带示例
原文:https://www . geesforgeks . org/abstractsequentialist-addall-method-in-Java-with-examples/
【抽象顺序列表】 的 addAll(int index，Collection C) 方法用于将集合中作为参数传递的所有元素追加到抽象顺序列表的特定索引或位置。
语法:
boolean addAll(int index, Collection C)
参数:该函数接受两个参数，如上语法所示，描述如下。
- 索引:该参数为整数数据类型，指定列表中从容器元素插入位置开始的位置。
- C :是需要追加元素的集合。
返回值:如果至少执行了一个追加操作，则该方法返回真。
下面的程序说明了 Java . util . abstractsequentialist . addall()方法:
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<String>
absqlist = new LinkedList<String>();
// 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<String>
collect = new ArrayList<String>();
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);
}
}
Output:
AbstractSequentialList: [Geeks, for, Geeks, 10, 20]
The new list is: [Geeks, A, Computer, Portal, for, Geeks, for, Geeks, 10, 20]
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<Integer>
absqlist = new LinkedList<Integer>();
// 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<Integer>
collect = new LinkedList<Integer>();
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);
}
}
Output:
The AbstractSequentialList is: [10, 20, 30, 10, 20]
The new list is: [10, 1, 2, 3, 4, 5, 20, 30, 10, 20]
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