The /v option causes JVIEW and WJVIEW to verify all invoked methods. Without this option, only methods from untrusted loaders are verified. Verification is a process applied to the bytecode loaded from the .class files to ensure that it does not pose a security threat. Verification enforces this so that if one of your .class files attempts to do anything that violates the security model, that file is rejected.
Note On Microsoft’s virtual machine for Java only a subset of the total functionality of this option is possible with the bytecode language for .class files that are loaded remotely.
For performance reasons, the local system classes are not normally verified. The /v option forces the verifier to process these files. You can use this option to ensure that a set of .class files will pass the verifier.
Example
Use the following JVIEW or WJVIEW command to insure the .class files of the SpinningWorld application do not pose a security problem:
JVIEW /v SpinningWorld-or-
WJVIEW /v SpinningWorld