...
Compliant Solution (jarsigner)
Users can ��������‚�š�š�š��������€š�š�š����������€š�š�š�š���������‚�š�š�š�? but usually do not ��������‚�š�š�š��������€š�š�š����������€š�š�š�š���������‚�š�š�š�? explicitly check JAR file signatures at the command line. This may be an adequate solution for programs that require manual installation of JAR files. Any malicious tampering results in a SecurityException when the jarsigner tool is invoked with the -verify option.
...