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Tips3_NullSafety.kt

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wanghailu

add code for kotlin demos

Feb 2, 2019

57ac7a3 · Feb 2, 2019

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Tips3_NullSafety.kt

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package M_tips // 默认 Kotlin不可空 object Tips3_NullSafety { // 1、默认类型不可空 // var a: Int // 不可赋空值 // val b: String = null // 2、如果想要赋值可空，需要加上？ var c:String? = null } fun main(args: Array<String>) { }

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