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    <p>Okay,seems like you can bypass the restriction by using reflection :</p> <pre><code>package lab.heapdump; import javax.management.MBeanServer; import java.lang.management.ManagementFactory; import java.lang.reflect.Method; @SuppressWarnings("restriction") public class HeapDump { // This is the name of the HotSpot Diagnostic MBean private static final String HOTSPOT_BEAN_NAME = "com.sun.management:type=HotSpotDiagnostic"; // field to store the hotspot diagnostic MBean private static volatile Object hotspotMBean; /** * Call this method from your application whenever you * want to dump the heap snapshot into a file. * * @param fileName name of the heap dump file * @param live flag that tells whether to dump * only the live objects */ static void dumpHeap(String fileName, boolean live) { // initialize hotspot diagnostic MBean initHotspotMBean(); try { Class clazz = Class.forName("com.sun.management.HotSpotDiagnosticMXBean"); Method m = clazz.getMethod("dumpHeap", String.class, boolean.class); m.invoke( hotspotMBean , fileName, live); } catch (RuntimeException re) { throw re; } catch (Exception exp) { throw new RuntimeException(exp); } } // initialize the hotspot diagnostic MBean field private static void initHotspotMBean() { if (hotspotMBean == null) { synchronized (HeapDump.class) { if (hotspotMBean == null) { hotspotMBean = getHotspotMBean(); } } } } // get the hotspot diagnostic MBean from the // platform MBean server private static Object getHotspotMBean() { try { Class clazz = Class.forName("com.sun.management.HotSpotDiagnosticMXBean"); MBeanServer server = ManagementFactory.getPlatformMBeanServer(); Object bean = ManagementFactory.newPlatformMXBeanProxy(server, HOTSPOT_BEAN_NAME, clazz); return bean; } catch (RuntimeException re) { throw re; } catch (Exception exp) { throw new RuntimeException(exp); } } public static void main(String[] args) { // default heap dump file name String fileName = "D:\\heap.bin"; // by default dump only the live objects boolean live = true; // simple command line options switch (args.length) { case 2: live = args[1].equals("true"); case 1: fileName = args[0]; } // dump the heap dumpHeap(fileName, live); } } </code></pre>
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    1. COReflection works! One have only to check if the `HotSpotDiagnosticMXBean` class is available in the current jdk.
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