Hi,
memory de-allocation is done by the Java garbage collector ("gc").
The gc strategy is fairly complex. Depending on your system, it may take quite a while, until the memory gets freed.
Google is your friend if you would like to get to know more details ...

Greetings

A1880

Hello Milan,

if you want to see a lot of internals about your JavaVM try this:
1. Go to the path [Drive]\Programs\Java\jdk1.6.0_16\bin
2. Start the program jvisualvm.exe
3. And now you see all you want: CPU usage, GC activity in the Monitor tab or all running threads in timeline, table and and and
You find a lot of information about Java VisualVM here.

Sometimes a programmer must be a detective.

Cheers
Stefan

Hi Milan,
the explicit call of "gc" does not necessarily trigger immediate action.
The Java implementation is free how and when to start garbage collection.

The garbage collection cannot free any object which is still referenced.
So, programmers have to make sure that unused references are returned as soon as possible.
It is good coding style (in memory intense applications) to set such references to "null" to allow early gc.

You can start the Java virtual machine with special commandline parameters to get verbose gc logging.
The specific parameters depend on your Java implementation.
Try "java -Xloggc:myGcLog.txt ..."

Success!

A1880

I have a silly sounding question:
Why would you like the memory to be de-allocated? Why do you care?
Do you run out of memory? Do you have a memory shortage for other applications?

If you want save memory for other applications, you can specify the maximum amout of Java memory on the Java command line.
The Java garbage collector will strive to stay in the memory limits either specified by default or by your explicit parameters.

If you minimize an application, the graphics drawing buffers can be thrown away.
This alone is good for several MBytes pixel buffer.

Greetings

A1880

Use RAMBOOSTER

it frees up mem

and clears some too

its quite good

or use TaskManager press Ctrl + Alt + Delete to open

select it then end process

or process explorer

select