在java代码中获取JVM参数的方法_Java教程

实例如下：

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									MemoryMXBean memorymbean = ManagementFactory.getMemoryMXBean();  

									  MemoryUsage usage = memorymbean.getHeapMemoryUsage();  

									  System.out.println("INIT HEAP: " + usage.getInit());  

									  System.out.println("MAX HEAP: " + usage.getMax());  

									  System.out.println("USE HEAP: " + usage.getUsed());  

									  System.out.println("\nFull Information:");  

									  System.out.println("Heap Memory Usage: "

									  + memorymbean.getHeapMemoryUsage());  

									  System.out.println("Non-Heap Memory Usage: "

									  + memorymbean.getNonHeapMemoryUsage());  

									  List<String> inputArguments = ManagementFactory.getRuntimeMXBean().getInputArguments();  

									  System.out.println("===================java options=============== "); 

									  System.out.println(inputArguments); 

									  System.out.println("=======================通过java来获取相关系统状态============================ "); 

									  int i = (int)Runtime.getRuntime().totalMemory()/1024;//Java 虚拟机中的内存总量,以字节为单位 

									  System.out.println("总的内存量 i is "+i); 

									  int j = (int)Runtime.getRuntime().freeMemory()/1024;//Java 虚拟机中的空闲内存量 

									  System.out.println("空闲内存量 j is "+j); 

									  System.out.println("最大内存量 is "+Runtime.getRuntime().maxMemory()/1024); 

									  System.out.println("=======================OperatingSystemMXBean============================ "); 

									  OperatingSystemMXBean osm = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean(); 

									//  System.out.println(osm.getFreeSwapSpaceSize()/1024); 

									//  System.out.println(osm.getFreePhysicalMemorySize()/1024); 

									//  System.out.println(osm.getTotalPhysicalMemorySize()/1024); 

									  //获取操作系统相关信息 

									  System.out.println("osm.getArch() "+osm.getArch()); 

									  System.out.println("osm.getAvailableProcessors() "+osm.getAvailableProcessors()); 

									  //System.out.println("osm.getCommittedVirtualMemorySize() "+osm.getCommittedVirtualMemorySize()); 

									  System.out.println("osm.getName() "+osm.getName()); 

									  //System.out.println("osm.getProcessCpuTime() "+osm.getProcessCpuTime()); 

									  System.out.println("osm.getVersion() "+osm.getVersion()); 

									  //获取整个虚拟机内存使用情况 

									  System.out.println("=======================MemoryMXBean============================ "); 

									  MemoryMXBean mm=(MemoryMXBean)ManagementFactory.getMemoryMXBean(); 

									  System.out.println("getHeapMemoryUsage "+mm.getHeapMemoryUsage()); 

									  System.out.println("getNonHeapMemoryUsage "+mm.getNonHeapMemoryUsage()); 

									  //获取各个线程的各种状态，CPU 占用情况，以及整个系统中的线程状况 

									  System.out.println("=======================ThreadMXBean============================ "); 

									  ThreadMXBean tm=(ThreadMXBean)ManagementFactory.getThreadMXBean(); 

									  System.out.println("getThreadCount "+tm.getThreadCount()); 

									  System.out.println("getPeakThreadCount "+tm.getPeakThreadCount()); 

									  System.out.println("getCurrentThreadCpuTime "+tm.getCurrentThreadCpuTime()); 

									  System.out.println("getDaemonThreadCount "+tm.getDaemonThreadCount()); 

									  System.out.println("getCurrentThreadUserTime "+tm.getCurrentThreadUserTime()); 

									  //当前编译器情况 

									  System.out.println("=======================CompilationMXBean============================ "); 

									  CompilationMXBean gm=(CompilationMXBean)ManagementFactory.getCompilationMXBean(); 

									  System.out.println("getName "+gm.getName()); 

									  System.out.println("getTotalCompilationTime "+gm.getTotalCompilationTime()); 

									  //获取多个内存池的使用情况 

									  System.out.println("=======================MemoryPoolMXBean============================ "); 

									  List<MemoryPoolMXBean> mpmList=ManagementFactory.getMemoryPoolMXBeans(); 

									  for(MemoryPoolMXBean mpm:mpmList){ 

									    System.out.println("getUsage "+mpm.getUsage()); 

									    System.out.println("getMemoryManagerNames "+mpm.getMemoryManagerNames().toString()); 

									  } 

									  //获取GC的次数以及花费时间之类的信息 

									  System.out.println("=======================MemoryPoolMXBean============================ "); 

									  List<GarbageCollectorMXBean> gcmList=ManagementFactory.getGarbageCollectorMXBeans(); 

									  for(GarbageCollectorMXBean gcm:gcmList){ 

									    System.out.println("getName "+gcm.getName()); 

									    System.out.println("getMemoryPoolNames "+gcm.getMemoryPoolNames()); 

									  } 

									  //获取运行时信息 

									  System.out.println("=======================RuntimeMXBean============================ "); 

									  RuntimeMXBean rmb=(RuntimeMXBean)ManagementFactory.getRuntimeMXBean(); 

									  System.out.println("getClassPath "+rmb.getClassPath()); 

									  System.out.println("getLibraryPath "+rmb.getLibraryPath()); 

									  System.out.println("getVmVersion "+rmb.getVmVersion());