subList() 方法用于截取并返回动态数组中的一部分。 subList() 方法的语法为: arraylist.subList(intfromIndex,inttoIndex) 注:arraylist 是 ArrayList 类的一个对象。 参数说明: fromIndex - 截取元素的起始位置,包含该索引位置元素 toIndex - 截取元素的结束位置,不包
2.指定索引之间的子列表 下面的 Java 程序从现有子列表获取一个子列表。我们正在获取从索引 2 到 6 的子列表。 请注意,数组列表的索引从 0 开始。 ArrayList<Integer> list = new ArrayList<>(Arrays.asList(0,1,2,3,4,5,6,7,8,9)); ArrayList<Integer> sublist = list.subList(2, 6); System.ou...
Pictorial presentation of ArrayList.subList() Method Example: Java ArrayList.subList Method In the following example the subList() method is used to get a portion of this list between the specified fromIndex, inclusive, and toIndex. import java.util.*; public class test { public static void mai...
import java.util.ArrayList; public class Main { public static void main(String[] args) { ArrayList<String> cars = new ArrayList<String>(); cars.add("Volvo"); cars.add("BMW"); cars.add("Ford"); cars.add("Mazda"); System.out.println( cars.subList(1, 3) ); } } ...
Java开发手册中对于ArrayList的subList的要求如下: 【强制】ArrayList 的 subList 结果不可强转成 ArrayList,否则会抛出 ClassCastException 异常: java.util.RandomAccessSubList cannot be cast to java.util.ArrayList。 说明:subList()返回的是 ArrayList 的内部类 SubList,并不是 ArrayList 本身, ...
01. 误用1 ArrayList 的 subList 结果不可强转成 ArrayList,否则会抛出 ClassCastException 异常: java.util.RandomAccessSubList cannot be cast to java.util.ArrayList 。public class Demo { public static …
The semantics of the list returned by this method become undefined if the backing list (i.e., this list) is structurally modified in any way other than via the returned list. (Structural modifications are those that change the size of this list, or otherwise perturb it in such a fashion ...
通常，我们常用的ArrayList是位于java.util包下的那个版本。然而，此处所提到的ArrayList并非我们平常所熟知的位于java.util包下的那个版本，而是Arrays类的一个内部类。它同样继承了AbstractList类，并覆盖了众多方法，其中包括我们此前提及的contains方法。然而，令人注意的是，它并未重写add方法。因此，当尝试调用add方法...
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* changes in the returned list are reflected in this list, and vice-versa. * The returned list supports all of the optional list operations. * * This method eliminates the need for explicit range operations (of * the sort that commonly exist for arrays). Any operation that expects * a...