Java 11 Features

Java 11 (LTS) introduced var in lambdas for annotations, new String methods (isBlank, strip, lines, repeat), Predicate.not(), a standardized HttpClient with HTTP/2, and single-file source launch.

Java 11's HttpClient replaces HttpURLConnection with a modern builder API, HTTP/2 support, synchronous send() and asynchronous sendAsync() returning CompletableFuture.

Java 11 added isBlank (empty or whitespace), strip (Unicode-aware trim), lines (lazy stream), repeat (duplicate), Files.readString/writeString (one-liner I/O), and Optional.isEmpty (inverse of isPresent).

Java Flight Recorder is a low-overhead profiling framework built into the JVM that continuously records GC, allocation, thread, and CPU events for production analysis.

Java 11 removed six Java EE modules (JAXB, JAX-WS, JAF, Common Annotations, CORBA, JTA) that were bundled in JDK 8, causing ClassNotFoundException for code that used them without explicit dependencies.