Once an object is garbage collected, it ceases to exist. It can no longer become reachable again.

No, once an object has been garbage collected in Java, it cannot become reachable again. Garbage collection is the process by which the Java Virtual Machine (JVM) automatically identifies and removes objects that are no longer reachable or referenced by any part of the program. Once an object is identified as unreachable and marked for garbage collection, the memory occupied by that object is reclaimed, and the object is considered to be permanently removed from the heap.

Therefore, once an object is garbage collected, there is no way for it to become reachable again in the context of the same program execution.