Not enough memory

Newbie & Debugging Questions
#1

i run a console application from command line
i have debug output:

          Runtime rt = Runtime.getRuntime();
          System.out.println(""+i+" max:"+rt.maxMemory()+" free:"+
              rt.freeMemory()+" total:"+rt.totalMemory());

i’ve discovered playing with the last command line parameter “java poker77.v1.B2Test -J-Xmx10m” that it does not effect
help please

#2

Try:


java -Xmx10M poker77.v1.B2Test

:wink:

#3

Thank u, Riven
maybe somebody knows how to expand memory for NetBeans IDE?

#4

Right click project, go properties

Click on Run

add -Xmx10M to vm options, click ok

HTH

#5

If you really want to change this setting for IDE itself (NOT for your applications you code in it), go to the /etc and edit the netbeans.conf file.

#6

i’ve been playing with options
the debug output is different for different options:
max:1013 free:97 total:271
and
max:506 free:96 total:271

but free memory is practically equal

any suggestions?

#7

The free memory is inside the total memory currently available, which is 271. Both time you ran your application, it used nearly the same amount, 174-175 bytes. You are only setting the maximum memory the JVM will attempt to use, which doesn’t affect the total memory currently given to the JVM.

#8

‘free’ is the amount of memory unused in the current heap (size = totalMemory)

if you want to get how much memory can still be allocated:


long used = Runtime.getRuntime().totalMemory() - Runtime.getRuntime().freeMemory();
long available = Runtime.getRuntime().maxMemory() - used;