One example of using JMX to monitor VMS

Package com.wonder;

Import Java.lang.management.ClassLoadingMXBean;
Import Java.lang.management.GarbageCollectorMXBean;
Import Java.lang.management.ManagementFactory;
Import Java.lang.management.MemoryMXBean;
Import Java.lang.management.MemoryUsage;
Import Java.lang.management.RuntimeMXBean;
Import java.util.List;

public class Testmain extends Thread {

Runtimemxbean Mxbean;

private void Setfactory () {
Mxbean = Managementfactory.getruntimemxbean ();
Here are the properties for getting the virtual machine
System.out.println ("=============== Virtual machine Information ===================");
SYSTEM.OUT.PRINTLN ("Virtual machine provider:" + Mxbean.getvmvendor ());
SYSTEM.OUT.PRINTLN ("Virtual machine Name:" + mxbean.getvmname ());
System.out.println ("Current classpath:" + Mxbean.getclasspath ());
SYSTEM.OUT.PRINTLN ("Process number @ machine:" + mxbean.getname ());
System.out.println ("Run Time (milliseconds):" + mxbean.getuptime ());

Class Management interface
System.out.println ("=============== class loading Information ===================");
Classloadingmxbean Aclassloadingmxbean = managementfactory
. Getclassloadingmxbean ();
SYSTEM.OUT.PRINTLN (total number of loaded classes:)
+ Aclassloadingmxbean.getloadedclasscount ());
SYSTEM.OUT.PRINTLN ("Verbose state:" + aclassloadingmxbean.isverbose ());

Memory Management Interface
System.out.println ("=============== Memory Information =====================");
Memorymxbean Amemorymxbean = Managementfactory.getmemorymxbean ();
SYSTEM.OUT.PRINTLN ("Terminated by number suspended:"
+ Amemorymxbean.getobjectpendingfinalizationcount ())//Returns the approximate number of objects whose termination was suspended
Returns the current consumption of non-heap memory used by the Java virtual machine
Memoryusage amemoryusage = Amemorymxbean.getnonheapmemoryusage (); Memory (in bytes) obtained from the system when the virtual machine is started
System.out.println ("The memory obtained from the system when the virtual machine is started:" + amemoryusage.getinit ()); Represents the amount of memory currently in use (in bytes)
System.out.println ("Current amount of memory used:" + amemoryusage.getused ()); Indicates that the guarantee can be
Java
Amount of memory (in bytes) used by the virtual machine

SYSTEM.OUT.PRINTLN ("The amount of memory used by the virtual machine:" + amemoryusage.getcommitted ()); Represents the maximum amount of memory, in bytes, that can be used for management
SYSTEM.OUT.PRINTLN ("Initial amount of memory management:" + amemoryusage.getinit ());
SYSTEM.OUT.PRINTLN ("Maximum memory Managed Storage:" + Amemoryusage.getmax ());
SYSTEM.OUT.PRINTLN ("Overall Description:" + amemoryusage.tostring ());

list<garbagecollectormxbean> Agcmxbeans = Managementfactory.getgarbagecollectormxbeans ();
Garbagecollectormxbean Agcmxbean = agcmxbeans.get (0);
SYSTEM.OUT.PRINTLN ("===============GC information =====================");
SYSTEM.OUT.PRINTLN ("Total collection:" + Agcmxbean.getcollectioncount ());
System.out.println ("Collection Time:" + agcmxbean.getcollectiontime ());
System.out.println ("Memory Manager is valid:" + agcmxbean.isvalid ());
System.out.println ("Memory Pool name:" + agcmxbean.getmemorypoolnames () [0]);
System.out.println ("Memory Pool name:" + agcmxbean.getmemorypoolnames () [1]);


System.out.println ("*****************end**********************");
}

public void Run () {
try {
while (true) {
Setfactory ();
Sleep (1000);
}
catch (Interruptedexception e) {
E.printstacktrace ();
}

}

public static void Main (string[] args) {
Testmain atest = new Testmain ();
Atest.start ();
}

}