Set<ObjectInstance> beans = con.queryMBeans(new ObjectName("java.lang:type=MemoryPool,name=*"), null);
		for (ObjectInstance bean : beans) {
			MemoryPoolMXBean pool = ManagementFactory.newPlatformMXBeanProxy(con, 
					bean.getObjectName().toString(), MemoryPoolMXBean.class);
			System.out.println(pool.getUsage().getUsed());
		}