运行结果是：
错误: 找不到或无法加载主类 base_7duixiang.Thiis
原因: java.lang.ClassNotFoundException: base_7duixiang.Thiis
原因是：同一个包内，使用的类名有重复，导致的报错，更改为正确的类名即可。
报错：Errors occurred during the build. Errors running builder 'Java Builder' on project 'base7'. java.lang.NullPointerException
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