Page History

...

This noncompliant code example uses the SecurityManager.checkRead() method to check whether the file schema.dtd can be read from the file system. The check*() methods lack support for fine-grained access control. For example, the check*() methods are inadequate to enforce a policy permitting read access to all files with the dtd extension and forbidding read access to all other files. Non-JDK code Code that is not itself part of the JDK must not use override the check*() methods because the default implementations of the Java libraries already use these methods to protect sensitive operations.

...

...