Java memory leaks

In general, there are two cases of memory leaks, in the case of a C + + language in which memory allocated in the heap is not freed, and all of its access to the memory is removed (for example, a pointer re-assignment). This situation is like, occupying the land, others have not been able to quote, and did not release space, memory leaks.

The other is that the memory and its references are still preserved when the memory object is clearly not needed.

The first case, in Java has been due to the existence of GC, has been well resolved. So the memory leak in Java is primarily the second type.

Performance: A memory-to-sexual life cycle exceeds the length of time that the program needs it.

Java memory leaks