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Java 11: Key Features, API Upgrades, and Performance Gains Explained

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Released in September 2018, Java 11 is a Long-Term Support (LTS) version and the first such release after Java 8, making it a preferred upgrade target for enterprises seeking production stability. The release introduced several developer-friendly improvements, including new String methods like strip(), isBlank(), and repeat(), along with simplified file read/write operations via Files.readString() and Files.writeString(). Java 11 also standardized the HttpClient API under java.net.http, adding native support for HTTP/2, WebSocket, and both synchronous and asynchronous request handling. On the performance side, it introduced the experimental Epsilon and ZGC garbage collectors, catering to use cases ranging from short-lived benchmarking jobs to low-latency applications with large heaps. Additional enhancements included running Java source files directly without compilation, extended use of var in lambda parameters, and improvements to the default G1 garbage collector.

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