The Policy class provides a method called getPermissions() that can be called to obtain the set of permissions granted to a specific CodeSource.

Policy类提供了一个名为getPermissions()的方法，可以调用它以获得授予特定 CodeSource 的一组权限。

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The ProtectionDomain calls the getPolicyNoCheck() method on the installed Policy class whenever the implies() method is called on it (essentially, when a permission is to be checked).

对ProtectionDomain调用implies()方法时（实质上是对权限进行检查时），它调用安装的Policy类的 getPolicyNoCheck() 方法。

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The ProtectionDomain calls the getPolicyNoCheck() method on the installed Policy class whenever the implies() method is called on it (essentially, when a permission is to be checked).

对ProtectionDomain调用implies()方法时（实质上是对权限进行检查时），它调用安装的Policy类的 getPolicyNoCheck() 方法。

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