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《阿里巴巴Java开发手册》码出高效详解（三）- 磨人的空指针问题解析-JavaEdge
source link: https://blog.51cto.com/11440114/2469382
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1引导语话不多说，先看手册指引的规范手册已经帮助我们总结了常见问题场景，但我们还需要深入研究空指针问题，才能做到发过程中得心应手。2问世间空指针为何物2.1官方解析应用需要一个对象时却传入了null，包含如下场景：调用null对象的实例方法访问或者修改null对象的属性获取值为null的数组的长度访问或者修改值为null的二维数组的列时把null当做Throwable对象抛出时。比如说手册中提到的
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