Java 将多个项目添加到数组
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Add multiple items to an array
提问by jknudsen99
So lets say I want to make an array of nine country names. I have the code to create the array:
所以假设我想制作一个包含九个国家/地区名称的数组。我有创建数组的代码：
String[] countryName = new String[9];
Lets say I wanted to add nine unique country names to this array. I could do something like this:
假设我想向这个数组添加九个唯一的国家名称。我可以做这样的事情：
countryName[0] = "Mexico";
countryName[1] = "United States";
and so on. But is there a way I could add all of the names at once? Maybe something like an add() statement?
等等。但是有没有一种方法可以一次添加所有名称？也许类似于 add() 语句？
采纳答案by Michel Foucault
you can initialize the array with:
您可以使用以下方法初始化数组：
String[] countryName = new String[]{"Mexico", "Italy", "Spain"};
回答by CoderCroc
Enlist all contries in Stringand use split
登记所有国家String并使用split
String str="Country1,Country2,Country3";
String array[]=str.split(",");//You even don't need to initialize array
Use delimeter carefully to avoid extra spaces.
小心使用分隔符以避免多余的空格。
NOTE:
As this is one of the ways to add values to array but still I suggest you to go for Michel Foucault's answer as splitwill have more overhead than direct initialization.
注意：因为这是向数组添加值的方法之一，但我仍然建议您选择Michel Foucault's answer ，因为它split比直接初始化有更多的开销。
回答by Ilya
You can write simple utility method using varargs
您可以使用编写简单的实用方法 varargs
static void addAll(String[] arr, String ... elements)
{
if (elements != null)
{
System.arraycopy(elements, 0, arr, 0, elements.length);
}
}
Usage
用法
addAll(countryName, "Mexico", "US", "Ukraine");
回答by DannyFeliz
Use an ArrayList this has the Add method.
使用具有 Add 方法的 ArrayList。
ArrayList<String> countryName = new ArrayList<String>();
countryName.add("Mexico");
countryName.add("United States");
countryName.add("Dominican Republic");
countryName.add("...");
