对于Java开发者而言，NullPointerException（空指针异常）堪称挥之不去的“梦魇”。编码时逻辑顺畅无虞，但项目一经运行，这一异常便可能突然现身，彻底中断业务流程。耗费大量时间排查后才发现，竟是某个字段遗漏了判空处理。这种被空指针支配的“PTSD”，让无数Java开发者苦不堪言。

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