How long do objects stay in JVM memory and what affects their lifecycle?

Objects in the JVM remain in memory as long as there are references to them from live parts of the program. The lifecycle of an object depends on the work of the garbage collector.

Key points:

• When an object is created, it is placed in the memory area (heap).
• If there are no more references to the object from active threads or static variables, it becomes a candidate for removal.
• The garbage collector periodically checks objects and frees memory from those that are unreachable.

Factors affecting the lifecycle:

• References from the stack (local variables)
• References from other objects
• Static references
• Caching and object pools

Thus, an object lives as long as there is at least one reference to it, and it is removed when the garbage collector determines that it is unreachable.