java代码获取jvm和heap的内存参数

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());