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在java代码中获取JVM参数的方法

2017-01-20 09:28 1356 查看

实例如下：

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());

以上这篇在java代码中获取JVM参数的方法就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持脚本之家。

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