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("=======================通過(guò)java來(lái)獲取相關(guān)系統(tǒng)狀態(tài)============================ "); 
  int i = (int)Runtime.getRuntime().totalMemory()/1024;//Java 虛擬機(jī)中的內(nèi)存總量,以字節(jié)為單位 
  System.out.println("總的內(nèi)存量 i is "+i); 
  int j = (int)Runtime.getRuntime().freeMemory()/1024;//Java 虛擬機(jī)中的空閑內(nèi)存量 
  System.out.println("空閑內(nèi)存量 j is "+j); 
  System.out.println("最大內(nèi)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); 
   
  //獲取操作系統(tǒng)相關(guān)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()); 
  //獲取整個(gè)虛擬機(jī)內(nèi)存使用情況 
  System.out.println("=======================MemoryMXBean============================ "); 
  MemoryMXBean mm=(MemoryMXBean)ManagementFactory.getMemoryMXBean(); 
  System.out.println("getHeapMemoryUsage "+mm.getHeapMemoryUsage()); 
  System.out.println("getNonHeapMemoryUsage "+mm.getNonHeapMemoryUsage()); 
  //獲取各個(gè)線程的各種狀態(tài)，CPU 占用情況，以及整個(gè)系統(tǒng)中的線程狀況 
  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()); 
   
  //當(dāng)前編譯器情況 
  System.out.println("=======================CompilationMXBean============================ "); 
  CompilationMXBean gm=(CompilationMXBean)ManagementFactory.getCompilationMXBean(); 
  System.out.println("getName "+gm.getName()); 
  System.out.println("getTotalCompilationTime "+gm.getTotalCompilationTime()); 
   
  //獲取多個(gè)內(nèi)存池的使用情況 
  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()); 
  } 
  //獲取GC的次數(shù)以及花費(fèi)時(shí)間之類的信息 
  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()); 
  } 
  //獲取運(yùn)行時(shí)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());