java.io.IOException cannot be resolved
可以考虑jre包的版本是不是不对 工程右键Properties，选择java Build Path。 如果JRE System Library后面有红色的符号，切换到libraries，选中错误的Remove，再点击Add Library。 选择JRE System Library。 点击Finish，然后等工程重新编译就好了。
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相关文章
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