Explain Java9 module.

Java module is a new feature in Java 9 via the Java Platform Module System (JPMS). JPMS Is also referred to as Java Jigsaw or Project Jigsaw.

A Java Module is a mechanism to package up your Java application and Java packages into Java modules. A Java module can specify which of the Java packages it contains that should be visible to other Java modules using this module. A Java module must also specify which other Java modules is requires to do its job.

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