By checking the
System.totalMemory
property,
you can determine the amount of memory (in bytes) that the runtime
is currently using. This property allows you to monitor memory usage
and optimize your applications based on how the memory level changes.
For example, if a particular visual effect causes a large increase
in memory usage, you may want to consider modifying the effect or
eliminating it altogether.
The
System.ime
property is a reference to the
currently installed Input Method Editor (IME). This property allows
you to listen for
imeComposition
events (
flash.events.IMEEvent.IME_COMPOSITION
)
by using the
addEventListener()
method.
The third property in the System class is
useCodePage
.
When
useCodePage
is set to
true
,
the runtime uses the traditional code page of the operating system
to load external text files. If you set this property to
false
,
you tell the runtime to interpret the external file as Unicode.
If you set
System.useCodePage
to
true
,
remember that the traditional code page of the operating system
must include the characters used in your external text file in order
for the text to display. For example, if you load an external text file
that contains Chinese characters, those characters cannot display
on a system that uses the English Windows code page because that
code page does not include Chinese characters.
To ensure that users on all platforms can view the external text
files that are used in your application, you should encode all external
text files as Unicode and leave
System.useCodePage
set
to
false
by default. This way, the runtime interprets
the text as Unicode.
