软件包 java.lang.management
提供管理接口,用于监视和管理 Java 虚拟机以及 Java 虚拟机在其上运行的操作系统。接口摘要
ClassLoadingMXBean | 用于 Java 虚拟机的类加载系统的管理接口。 |
CompilationMXBean | 用于 Java 虚拟机的编译系统的管理接口。 |
GarbageCollectorMXBean | 用于 Java 虚拟机的垃圾回收的管理接口。 |
MemoryManagerMXBean | 内存管理器的管理接口。 |
MemoryMXBean | Java 虚拟机的内存系统的管理接口。 |
MemoryPoolMXBean | 内存池的管理接口。 |
OperatingSystemMXBean | 用于操作系统的管理接口,Java 虚拟机在此操作系统上运行。 |
RuntimeMXBean | Java 虚拟机的运行时系统的管理接口。 |
ThreadMXBean | Java 虚拟机线程系统的管理接口。 |
- import java.lang.management.ClassLoadingMXBean;
- import java.lang.management.CompilationMXBean;
- import java.lang.management.GarbageCollectorMXBean;
- import java.lang.management.ManagementFactory;
- import java.lang.management.MemoryMXBean;
- import java.lang.management.MemoryManagerMXBean;
- import java.lang.management.MemoryPoolMXBean;
- import java.lang.management.MemoryUsage;
- import java.lang.management.OperatingSystemMXBean;
- import java.lang.management.RuntimeMXBean;
- import java.lang.management.ThreadMXBean;
- import java.util.List;
- import javax.management.MBeanServerConnection;
- public class MBeanDemo {
- public static void main(String[] args) {
- showJvmInfo();
- showMemoryInfo();
- showSystem();
- showClassLoading();
- showCompilation();
- showThread();
- showGarbageCollector();
- showMemoryManager();
- showMemoryPool();
- }
- /**
- * Java 虚拟机的运行时系统
- */
- public static void showJvmInfo() {
- RuntimeMXBean mxbean = ManagementFactory.getRuntimeMXBean();
- String vendor = mxbean.getVmVendor();
- System.out.println("jvm name:" + mxbean.getVmName());
- System.out.println("jvm version:" + mxbean.getVmVersion());
- System.out.println("jvm bootClassPath:" + mxbean.getBootClassPath());
- System.out.println("jvm start time:" + mxbean.getStartTime());
- }
- /**
- * Java 虚拟机的内存系统
- */
- public static void showMemoryInfo() {
- MemoryMXBean mem = ManagementFactory.getMemoryMXBean();
- MemoryUsage heap = mem.getHeapMemoryUsage();
- System.out.println("Heap committed:" + heap.getCommitted() + " init:" + heap.getInit() + " max:"
- + heap.getMax() + " used:" + heap.getUsed());
- }
- /**
- * Java 虚拟机在其上运行的操作系统
- */
- public static void showSystem() {
- OperatingSystemMXBean op = ManagementFactory.getOperatingSystemMXBean();
- System.out.println("Architecture: " + op.getArch());
- System.out.println("Processors: " + op.getAvailableProcessors());
- System.out.println("System name: " + op.getName());
- System.out.println("System version: " + op.getVersion());
- System.out.println("Last minute load: " + op.getSystemLoadAverage());
- }
- /**
- * Java 虚拟机的类加载系统
- */
- public static void showClassLoading(){
- ClassLoadingMXBean cl = ManagementFactory.getClassLoadingMXBean();
- System.out.println("TotalLoadedClassCount: " + cl.getTotalLoadedClassCount());
- System.out.println("LoadedClassCount" + cl.getLoadedClassCount());
- System.out.println("UnloadedClassCount:" + cl.getUnloadedClassCount());
- }
- /**
- * Java 虚拟机的编译系统
- */
- public static void showCompilation(){
- CompilationMXBean com = ManagementFactory.getCompilationMXBean();
- System.out.println("TotalCompilationTime:" + com.getTotalCompilationTime());
- System.out.println("name:" + com.getName());
- }
- /**
- * Java 虚拟机的线程系统
- */
- public static void showThread(){
- ThreadMXBean thread = ManagementFactory.getThreadMXBean();
- System.out.println("ThreadCount" + thread.getThreadCount());
- System.out.println("AllThreadIds:" + thread.getAllThreadIds());
- System.out.println("CurrentThreadUserTime" + thread.getCurrentThreadUserTime());
- //......还有其他很多信息
- }
- /**
- * Java 虚拟机中的垃圾回收器。
- */
- public static void showGarbageCollector(){
- List<GarbageCollectorMXBean> gc = ManagementFactory.getGarbageCollectorMXBeans();
- for(GarbageCollectorMXBean GarbageCollectorMXBean : gc){
- System.out.println("name:" + GarbageCollectorMXBean.getName());
- System.out.println("CollectionCount:" + GarbageCollectorMXBean.getCollectionCount());
- System.out.println("CollectionTime" + GarbageCollectorMXBean.getCollectionTime());
- }
- }
- /**
- * Java 虚拟机中的内存管理器
- */
- public static void showMemoryManager(){
- List<MemoryManagerMXBean> mm = ManagementFactory.getMemoryManagerMXBeans();
- for(MemoryManagerMXBean eachmm: mm){
- System.out.println("name:" + eachmm.getName());
- System.out.println("MemoryPoolNames:" + eachmm.getMemoryPoolNames().toString());
- }
- }
- /**
- * Java 虚拟机中的内存池
- */
- public static void showMemoryPool(){
- List<MemoryPoolMXBean> mps = ManagementFactory.getMemoryPoolMXBeans();
- for(MemoryPoolMXBean mp : mps){
- System.out.println("name:" + mp.getName());
- System.out.println("CollectionUsage:" + mp.getCollectionUsage());
- System.out.println("type:" + mp.getType());
- }
- }
- /**
- * 访问 MXBean 的方法的三种方法
- */
- public static void visitMBean(){
- //第一种直接调用同一 Java 虚拟机内的 MXBean 中的方法。
- RuntimeMXBean mxbean = ManagementFactory.getRuntimeMXBean();
- String vendor1 = mxbean.getVmVendor();
- System.out.println("vendor1:" + vendor1);
- //第二种通过一个连接到正在运行的虚拟机的平台 MBeanServer 的 MBeanServerConnection。
- MBeanServerConnection mbs = null;
- // Connect to a running JVM (or itself) and get MBeanServerConnection
- // that has the JVM MXBeans registered in it
- /*
- try {
- // Assuming the RuntimeMXBean has been registered in mbs
- ObjectName oname = new ObjectName(ManagementFactory.RUNTIME_MXBEAN_NAME);
- String vendor2 = (String) mbs.getAttribute(oname, "VmVendor");
- System.out.println("vendor2:" + vendor2);
- } catch (Exception e) {
- e.printStackTrace();
- }
- */
- //第三种使用 MXBean 代理
- // MBeanServerConnection mbs3 = null;
- // RuntimeMXBean proxy;
- // try {
- // proxy = ManagementFactory.newPlatformMXBeanProxy(mbs3,ManagementFactory.RUNTIME_MXBEAN_NAME,
- // RuntimeMXBean.class);
- // String vendor = proxy.getVmVendor();
- // } catch (IOException e) {
- // e.printStackTrace();
- // }
- }
- }
- jvm name:Java HotSpot(TM) 64-Bit Server VM
- jvm version:25.73-b02
- jvm bootClassPath:C:\Program Files\Java\jdk1.8.0_73\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_73\jre\lib\rt.jar;C:\Program Files\Java\jdk1.8.0_73\jre\lib\sunrsasign.jar;C:\Program Files\Java\jdk1.8.0_73\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_73\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_73\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_73\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_73\jre\classes
- jvm start time:1466262407530
- Heap committed:128974848 init:134217728 max:1890582528 used:2726800
- Architecture: amd64
- Processors: 4
- System name: Windows 8.1
- System version: 6.3
- Last minute load: -1.0
- TotalLoadedClassCount: 447
- LoadedClassCount447
- UnloadedClassCount:0
- TotalCompilationTime:13
- name:HotSpot 64-Bit Tiered Compilers
- ThreadCount5
- AllThreadIds:[J@2a139a55
- CurrentThreadUserTime140625000
- name:PS Scavenge
- CollectionCount:0
- CollectionTime0
- name:PS MarkSweep
- CollectionCount:0
- CollectionTime0
- name:CodeCacheManager
- MemoryPoolNames:[Ljava.lang.String;@15db9742
- name:Metaspace Manager
- MemoryPoolNames:[Ljava.lang.String;@6d06d69c
- name:PS Scavenge
- MemoryPoolNames:[Ljava.lang.String;@7852e922
- name:PS MarkSweep
- MemoryPoolNames:[Ljava.lang.String;@4e25154f
- name:Code Cache
- CollectionUsage:null
- type:Non-heap memory
- name:Metaspace
- CollectionUsage:null
- type:Non-heap memory
- name:Compressed Class Space
- CollectionUsage:null
- type:Non-heap memory
- name:PS Eden Space
- CollectionUsage:init = 34078720(33280K) used = 0(0K) committed = 0(0K) max = 698351616(681984K)
- type:Heap memory
- name:PS Survivor Space
- CollectionUsage:init = 5242880(5120K) used = 0(0K) committed = 0(0K) max = 5242880(5120K)
- type:Heap memory
- name:PS Old Gen
- CollectionUsage:init = 89653248(87552K) used = 0(0K) committed = 0(0K) max = 1417674752(1384448K)
- type:Heap memory
参考文件:
(原文)http://blog.csdn.net/zhongweijian/article/details/7619383
java.lang.management.ManagementFactory学习
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