// set default value for an unknown string
var str = ",,"
var str = 12
var str = null
var str = 0F
val x = str?.toString()?.length ?: "unknown"
// set integer
val y = a.toIntOrNull() ?: 0
val id: Int = editText.text.trim().toString().toIntOrNull() ?: 0
kotlin 设置int和string变量的默认值
最新推荐文章于 2025-03-06 13:26:23 发布