您可以使用这些方法

var numbers=Array<Int>(size,init)
var numbers=IntArray(size,init)
var numbers= intArrayOf(1,2,3)

例子

var numbers = Array<Int>(5, { i -> 0 })

Init表示默认值(initialize)

您可以使用这些方法

var numbers=Array<Int>(size,init)
var numbers=IntArray(size,init)
var numbers= intArrayOf(1,2,3)

例子

var numbers = Array<Int>(5, { i -> 0 })

Init表示默认值(initialize)

值得一提的是，当使用kotlin内置程序(例如intArrayOf()， longArrayOf()， arrayOf()等)时，对于给定的大小，您不能使用默认值(或所有值为所需值)初始化数组，相反，您需要通过根据类构造函数调用来进行初始化。

// Array of integers of a size of N
val arr = IntArray(N)

// Array of integers of a size of N initialized with a default value of 2
val arr = IntArray(N) { i -> 2 }

老问题了，但如果你想使用一个范围:

var numbers: IntArray = IntRange(10, 50).step(10).toList().toIntArray()

产生几乎相同的结果:

var numbers = Array(5, { i -> i*10 + 10 })

结果:10,20,30,40,50

我认为第一个选项更有可读性。这两个工作。

在我的情况下，我需要初始化我的抽屉项目。我通过以下代码填充数据。

    val iconsArr : IntArray = resources.getIntArray(R.array.navigation_drawer_items_icon)
    val names : Array<String> = resources.getStringArray(R.array.navigation_drawer_items_name)


    // Use lambda function to add data in my custom model class i.e. DrawerItem
    val drawerItems = Array<DrawerItem>(iconsArr.size, init = 
                         { index -> DrawerItem(iconsArr[index], names[index])})
    Log.d(LOGGER_TAG, "Number of items in drawer is: "+ drawerItems.size)

自定义模型类-

class DrawerItem(var icon: Int, var name: String) {

}

I think one thing that is worth mentioning and isn't intuitive enough from the documentation is that, when you use a factory function to create an array and you specify it's size, the array is initialized with values that are equal to their index values. For example, in an array such as this: val array = Array(5, { i -> i }), the initial values assigned are [0,1,2,3,4] and not say, [0,0,0,0,0]. That is why from the documentation, val asc = Array(5, { i -> (i * i).toString() }) produces an answer of ["0", "1", "4", "9", "16"]