The default SecurityManager checks whether the caller of a particular method has sufficient permissions to proceed with an action. An action is defined in Java's security architecture as a level of access ; for instanceand requires certain permissions before it can be performed. For Example, the actions for java.io.FilePermission are read, write, execute, and delete [API 20112013]. The "Permission Descriptions and Risks" guide [Oracle 2008] enumerates the default permissions and the risks associated with granting these permissions to Java code.
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