When the IJ IDEA compiler generates an xml file with a specific name, the file cannot be generated

Interesting problems encountered in IntelliJ IDEA Java development. When
naming the .xml file, the name of Test1_8.xml will not generate the xml file, but will become the icon of the notepad, the suffix is ​​still the xml format
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And the content of the corresponding file is not compiled:
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After trying, the lowercase test1_8.xml works.
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Except for the uppercase T is still unavailable, the other combinations of T, e, s, t, 1, _, 8 tried are all available, and other numbers can be generated normally:
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Reason Unknown, it is estimated that something went wrong with the compiler, but my personal ability is limited, so I will talk about it later.

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Origin blog.csdn.net/qq_45055683/article/details/109097099