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RuntimeMXBean

vladislav peichev
Greenhorn

Joined: Apr 28, 2011
Posts: 22
I try to verify Java heap size inside an applet running in XHTML page using the following code :

However sometimes (1 in 10-15 loadings of the applet) the list does not contain -Xmx parameter and result variable has value of zero. Does anybody have an idea why does this issue occur and is there a possible solution. Thanks in advance.
Karthik Shiraly
Ranch Hand

Joined: Apr 04, 2009
Posts: 491
    
    5
The -Xmx arg is not mandatory, but JVM always has a max heap value. Instead of relying on command line args to infer max heap, you can get a MemoryMXBean using ManagementFactory.getMemoryMXBean() and use its getHeapMemoryUsage().getMax().
 
It is sorta covered in the JavaRanch Style Guide.
 
subject: RuntimeMXBean
 
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