ArrayList public ArrayList(Collection<? extends E> c) 按照集合的迭代器返回的顺序构造一个包含指定集合元素的列表。 参数 c - c其元素放入此列表的集合 异常 NullPointerException - 如果指定的集合为null 方法详细信息trimToSize public void trimToSize() 将此ArrayList实例的容量调整为列表的当前大小。
Understanding ArrayList in Java The ArrayList class in Java is a part of the Java Collections Framework. It is a resizable array, which means it can grow or shrink dynamically. This feature makes ArrayList a popular choice for handling data in Java. An ArrayList has several key characteristics ...
In this article, we’re going to take a look atArrayListclass from the Java Collections Framework. We’ll discuss its properties, common use cases, as well as its advantages and disadvantages. ArrayListresides within Java Core Libraries, so you don’t need any additional libraries. In order t...
This article is part ofthe “Java – Back to Basic” serieshere on Baeldung. 2. With the JDK First, the JDK provides a nice way to get an unmodifiable collection out of an existing one: The new collection should no longer be modifiable at this point: @Test(expected = UnsupportedOperation...
The JavaArrayListclass is part of theCollection framework. TheArrayListis an implementation of a resizable array data structure that automatically grows and shrinks when elements are added or removed in the runtime, whenever required, The new elements are always added to the end of current arraylis...
ArrayList is part of Java’s collection framework and implements Java’sListinterface. ArrayList是Java集合框架的一部分,并实现Java的List接口 Following are few key points to note about ArrayList in Java - 以下是有关Java中ArrayList的几点注意事项 ...
List 是 Java Interface, ArrayList 是 Java Class,它们都属于 java.util 包。 Java List 是有序的集合(ordered collection),也称为序列(Sequence); Java ArrayList 是 Java List Interface 的可变大小的数组实现。 这两者在 JAVA collection framework 位置,如下图所示: ...
关于Java中的遗留容器,我最后再补充一下。除Vector之外,还有Hashtable、Dictionary、BitSet、Stack、Properties都是遗留容器,这些容器中,Properties 类存在比较严重的设计缺陷。来看这段源码: /* Since : JDK1.0 See Also : native2ascii tool forSolaris, native2ascii tool forWindowsAuthor : Arthur van Hoff, Mich...
The JavaArrayListrepresents a resizable array of objects which allows us to add, remove, find, sort and replace elements. TheArrayListis part of theCollection frameworkand implements in theListinterface. We can initialize anArrayListin a number of ways depending on the requirement. In this tutorial...
This class is a member of theJava Collections Framework. Since: 1.2 See Also: Collection,List,LinkedList,Vector,Serialized Form Field Summary Fields inherited from class java.util.AbstractList modCount Constructor Summary Constructors Constructor and Description ...