WebJun 7, 2015 · Note that Arraylist class is in java.util.ArrayList. Create an ArrayList as you would any objects. import java.util.ArrayList; //.. ArrayList ajay = new ArrayList (); Here. ArrayList -> Class. ajay -> object. You can optionally specify the capacity and type of object the ArrayList will hold on: ArrayList ajay = new ArrayList (10); Web其实，可能要初始化的"最佳"方式，ArrayList 是你写的方法，因为它不需要创建一个新的 List 以任何方式： ArrayList < String > list = new ArrayList < String >(); list. add ("A"); …

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Web一、最常用的初始化方式。 1 List list1 = new ArrayList (); 2 list1.add ("apple" ); 3 list1.add ("banana" ); 4 list1.add ("orange"); 这是比较常用的方式，先创建一个list1，再给list1赋值。 二、使用一个List来初始化。 1 List list2 = new ArrayList (Arrays.asList ("apple", "banana", "orange")); 这种方式跟第一种方式 … Web其实，可能要初始化的"最佳"方式，ArrayList 是你写的方法，因为它不需要创建一个新的 List 以任何方式： ArrayList < String > list = new ArrayList < String >(); list. add ("A"); list. add ("B"); list. add ("C");. 渔获是相当多的键入所需，请参阅 list 实例。. 有如使一个匿名的内部类的一个实例初始值设定项 （也称为一种 ... WebJava ArrayList class uses a dynamic array for storing the elements. It is like an array, but there is no size limit. We can add or remove elements anytime. So, it is much more flexible than the traditional array. It is found in the java.util package. It is like the Vector in C++. The ArrayList in Java can have the duplicate elements also. china aquarium bio filter factories