How do I determine whether a JAR file has been signed?

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Index:Java 2 Standard Edition (J2SE):Java 2 JDK:Utility classes (java.util.*):JarFiles (java.util.jar.*)

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How do I determine whether a JAR file has been signed?

Execute the following:

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When it has not been signed, it will output:

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If successful:

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Further Information

Author of answer: Joris Van den Bogaert

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