Variable 'X' is used before it has been assigned a value. A null reference exception could result at...
在自己做机房收费系统的过程中出现了这样的一个现象:如图 str1 下面出现了一行波浪线.同时提醒自己错出现的错误.提示如下: Variable 'str1' is used before it has been assigned a value. A null reference exception could result at runtime. 在Build的时候会出现以下的警告: 如图: 问
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相关文章
- 1. What are the differences between a pointer variable and a reference variable in C++?
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- 8. org.hibernate.PropertyAccessException: Null value was assigned to a property of primitive type sette
- 9. efined in null, could not be registered. A bean with that name has already been defined in null and
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