Advanced Optical Wireless Communication Systems Advanced Optical Wireless Communication Systems Optical wireless communications is a dynamic area of research and development. Com- bining fundamental theory with a broad overview, this book is an idea
GC：Gabage Collection，指JVM堆内存区域的垃圾回收
Minor GC：年轻代垃圾回收，所有的Majar GC都会触发进程暂停，只是这个实际很短
Major GC：也叫Full GC，年老代垃圾回收
年轻代和年老代的GC策略是不一样的，年轻代一般采用的是复制算法。
Minor GC和Major GC的发生时机
Minor GC发生Eden区域被占满时。第一次触发gc时，Eden存活的对象被复制到Survivor Space的To区。每次g
