List<String> list =Lists.newArrayList("a","b","c"); 1 这个和Arrays.asList一样简洁清晰。 参考 Double Brace Initialization How to initialize List object in Java?
在这段代码中,我们首先声明了一个String类型的数组fruits,然后使用Arrays.asList()方法将数组fruits转换为List,最后将List赋值给list。这样就完成了List对象的初始化。 示例代码 下面是一个完整的示例代码,演示了如何声明和初始化一个List对象,并遍历List中的元素: importjava.util.*;publicclassMain{publicstaticvoidm...
在上述代码示例中,我们直接使用Arrays.asList方法来初始化具有初始元素的List对象listWithElements。 4. 使用流程图进行总结 下面是一个使用流程图表示初始化List的过程的示例: flowchart start --> initializeEmptyList initializeEmptyList --> initializeListWithElements initializeListWithElements --> end 结论 本文介...
We can create aListfrom an array. And thanks to array literals, we can initialize them in one line: List<String> list = Arrays.asList(new String[]{"foo", "bar"}); We can trust the varargs mechanism to handle the array creation. With that, we can write more concise and readable co...
BothArrays.asList()andCollections.addAll()provide a quick and convenient way to initialize an ArrayList with predefined elements. However, they have one major drawback: the resulting ArrayList is fixed-size. This means you cannot add or remove elements from it. If you need a dynamic ArrayList...
initialize a hashset with values:List<Character> list = Arrays.asList('a','e','i','o','u'); HashSet<Character> set = new HashSet<>(list);or you can use Collections.addAll(), or you can initialize a set and add items one by one. ...
1.1. UseArrays.asList()to InitializeArrayListfromArray Toinitialize an ArrayList in a single line statement, get all elements from an array usingArrays.asListmethod and pass the array argument toArrayListconstructor. ArrayList<String>names=newArrayList<>(Arrays.asList("alex","brian","charles")); ...
类的初始化(Initialize) JVM负责对类进行初始化。 ①执行类构造器<clinit>()方法的过程。类构造器< clinit> ()方法是由编译期自动收集类中所有类变量的赋值动作和静态代码块中的语句合并产生的(类构造器是构造类信息的,不是构造该类对象的构造器)。 ②当初始化一个类的时候,如果发现其父类还没有进行初始化,则...
ArrayListSpliterator(ArrayList<E> list, int origin, int fence, int expectedModCount) { this.list = list; // OK if null unless traversed this.index = origin; this.fence = fence; this.expectedModCount = expectedModCount; } private int getFence() { // initialize fence to size on first ...
ArrayListSpliterator(ArrayList<E> list, int origin, int fence, int expectedModCount) { this.list = list; // OK if null unless traversed this.index = origin; this.fence = fence; this.expectedModCount = expectedModCount; } private int getFence() { // initialize fence to size on first ...