swing Memory viewer

The JMemoryViewer class is a component which shows the memory used by the program compared to the total memory available for the JVM.

Usage

To use the component, you just have to use the default constructor and start the internal timer which will update the available free memory each second:

   JMemoryViewer mv = new JMemoryViewer();
   mv.start();

You can put it in any container. The component will keep its preferred size.

Configuration

There are several ways to configure the component:

• By default the viewer shows the available free memory in percentage relative to the total memory allocated to the JVM. It is possible to change the type of presenration by using JMemoryViewer.setRemainingTypeValue(short):
  • JMemoryViewer.TYPE_SHOW_NONE will not show any value
  • JMemoryViewer.TYPE_SHOW_MB will not show thr value in MB
  • JMemoryViewer.TYPE_SHOW_PERCENT will not show thr value in percentage
• The JMemoryViewer.setUseColorLimits(boolean) specifies if the color of the bar showing the used memory must change depending on the value. There are three possible colors:
  • Red when the used memory is greater than JMemoryViewer.getRedColorLimit()
  • Orange when the used memory is greater than JMemoryViewer.getOrangeColorLimit()
  • Green in the other case
• It is possible to specify the preferred width of the compoenent (which will also be its maximum width)