Java 18 is the latest version of the Java programming language and platform. It introduced several new features and enhancements, including:

1. Pattern Matching for the instanceof Operator: This feature simplifies the code for type checking and casting by introducing a more concise syntax.

2. Records: Records are a new type of class introduced in Java 16 but further enhanced in Java 18. They provide a concise way to create classes that are primarily used to store data.

3. Sealed Classes: Sealed classes and interfaces allow you to control which other classes or interfaces can extend or implement them, providing better control over your class hierarchy.

4. Foreign Function and Memory API (Incubator): This API allows Java programs to interact with native code and memory more easily, providing better integration with non-Java libraries.

5. New Garbage Collectors: Java 18 introduced two new garbage collectors, Z Garbage Collector (ZGC) enhancements, and a Garbage-First (G1) collector improvement, which can help improve the performance and efficiency of Java applications.

6. Deprecation and Removals: Java 18 also deprecated or removed several older APIs and features to make the platform more streamlined and maintainable.

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If you have specific questions about Java 18 or need assistance with any related tasks, please feel free to ask.