Kotlin异常处理runCatching，getOrNull，onFailure，onSuccess（1）

比眉伴天荒 2024-03-01 01:42 23阅读 0赞

### Kotlin异常处理runCatching，getOrNull，onFailure，onSuccess（1） ###

###  ###

fun main(args: Array<String>) {
        var s1 = runCatching {
            1 / 1
        }.getOrNull()
        println(s1) //s1=1，打印1
    
        println("-")
    
        var s2 = runCatching {
            1 / 0 //发生异常
        }.getOrNull()
        println(s2) //s2为null
    
        println("--")
    
        runCatching {
            1 / 1
        }.onFailure {
            println("onFailure $it") //不会执行，因为runCatching没有失败
        }.onSuccess {
            println("onSuccess $it") //执行，因为runCatching成功
        }
    
        println("---")
    
        runCatching {
            1 / 0 //发生异常
        }.onFailure {
            println("onFailure $it") //执行，因为runCatching失敗了
        }.onSuccess {
            println("onSuccess $it") //不会执行，因为runCatching沒有成功
        }
    }

> 1  
> \-  
> null  
> \--  
> onSuccess 1  
> \---  
> onFailure java.lang.ArithmeticException: / by zero

[kotlin异常处理try-catch-finally\_zhangphil的博客-CSDN博客b-catch: java.lang.RuntimeException: b发生异常。kotlin异常处理try-catch-finally。![favicon32.ico][]https://blog.csdn.net/zhangphil/article/details/129800172][kotlin_try-catch-finally_zhangphil_-CSDN_b-catch_ java.lang.RuntimeException_ b_kotlin_try-catch-finally_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_129800172]

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[kotlin_try-catch-finally_zhangphil_-CSDN_b-catch_ java.lang.RuntimeException_ b_kotlin_try-catch-finally_favicon32.ico_https_blog.csdn.net_zhangphil_article_details_129800172]: https://blog.csdn.net/zhangphil/article/details/129800172