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Shaoxiong
committedJun 18, 2021
init 类加载器
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‎01-类加载子系统/06-沙箱安全机制.md

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报错信息说没有main方法就是因为加载的是rt.jar包中的String类。
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这样可以保证对java核心源代码的保护,这就是沙箱安全机制.
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## 2、类比举例
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## 2、类比举例
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#### 我们在读写U盘信息时可以用360沙箱,防止U盘内的病毒等对沙箱外的系统构成污染
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