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UUID in Java

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  • Post last modified:November 3, 2023

UUID (Universally Unique Identifier) is a 128-bit identifier that is guaranteed to be unique across all devices and all time. In Java, you can work with UUIDs using the java.util.UUID class. UUIDs are commonly used in various applications, including database primary keys, distributed systems, and as a way to uniquely identify resources.

In Java, you can create UUIDs using the java.util.UUID class. There are different methods to generate UUIDs, including random-based, time-based, and name-based UUIDs.

Use Cases for UUIDs

  1. Database Primary Keys: UUIDs are often used as primary keys in databases to ensure uniqueness in distributed systems.
  2. Distributed Systems: In distributed systems, UUIDs can be used to identify resources or transactions uniquely.
  3. Session Management: UUIDs can be used to manage sessions and user authentication.
  4. Data Deduplication: In data processing pipelines, UUIDs are used to deduplicate data records.
  5. URL Shortening Services: Some URL shortening services use UUIDs to generate short and unique URLs.

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