A：JDK 26预定于2026年3月17日发布，包含10个主要新功能：原始类型模式匹配的第四次预览、提前时对象缓存、Vector API第十一次孵化、惰性常量和PEM编码的第二次预览、结构化并发第六次预览、deep reflection警告、G1 GC性能优化、HTTP/3支持，以及移除Java Applet API。

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