代码如下：
import java.lang.management.CompilationMXBean;
import java.lang.management.GarbageCollectorMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.MemoryMXBean;
import java.lang.management.MemoryPoolMXBean;
import java.lang.management.RuntimeMXBean;
import java.lang.management.ThreadMXBean;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.List;
import com.sun.management.OperatingSystemMXBean;
public class MyJvm {
/**
* @param 直接通过jdk来获取系统相关状态
* @throws UnknownHostException
*/
public static void main(String[] args) throws UnknownHostException {
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);
//获取操纵系统相关信息
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());
//out.print("");
System.out.println("=======================通过java来获取相关系统状态============================ ");
int i1 = (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 "+i1);
int j1 = (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 "+j1);
System.out.println("最大内存量 is "+Runtime.getRuntime().maxMemory()/1024);
System.out.println("java临时目录is"+System.getProperty("java.io.tmpdir"));
System.out.println("java版本is"+System.getProperty("java.version"));
System.out.println("ip地址is"+InetAddress.getLocalHost().getHostAddress());
OperatingSystemMXBean osm2 = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
System.out.println("操作系统："+osm2.getName());
System.out.println("=======================OperatingSystemMXBean============================ ");
OperatingSystemMXBean osm1 = (OperatingSystemMXBean) ManagementFactory.getOperatingSystemMXBean();
System.out.println(osm1.getFreeSwapSpaceSize()/1024);
System.out.println(osm1.getFreePhysicalMemorySize()/1024);
System.out.println(osm1.getTotalPhysicalMemorySize()/1024);
//获取操作系统相关信息
System.out.println("osm.getArch() "+osm1.getArch());
System.out.println("osm.getAvailableProcessors() "+osm1.getAvailableProcessors());
System.out.println("osm.getCommittedVirtualMemorySize() "+osm1.getCommittedVirtualMemorySize());
System.out.println("osm.getName() "+osm1.getName());
System.out.println("osm.getProcessCpuTime() "+osm1.getProcessCpuTime());
System.out.println("osm.getVersion() "+osm1.getVersion());
//获取整个虚拟机内存使用情况
System.out.println("=======================MemoryMXBean============================ ");
MemoryMXBean mm1=(MemoryMXBean)ManagementFactory.getMemoryMXBean();
System.out.println("getHeapMemoryUsage "+mm1.getHeapMemoryUsage());
System.out.println("getNonHeapMemoryUsage "+mm1.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 tm1=(ThreadMXBean)ManagementFactory.getThreadMXBean();
System.out.println("getThreadCount "+tm1.getThreadCount());
System.out.println("getPeakThreadCount "+tm1.getPeakThreadCount());
System.out.println("getCurrentThreadCpuTime "+tm1.getCurrentThreadCpuTime());
System.out.println("getDaemonThreadCount "+tm1.getDaemonThreadCount());
System.out.println("getCurrentThreadUserTime "+tm1.getCurrentThreadUserTime());
//当前编译器情况
System.out.println("=======================CompilationMXBean============================ ");
CompilationMXBean gm1=(CompilationMXBean)ManagementFactory.getCompilationMXBean();
System.out.println("getName "+gm1.getName());
System.out.println("getTotalCompilationTime "+gm1.getTotalCompilationTime());
//获取多个内存池的使用情况
System.out.println("=======================MemoryPoolMXBean============================ ");
List<MemoryPoolMXBean> mpmList1=ManagementFactory.getMemoryPoolMXBeans();
for(MemoryPoolMXBean mpm:mpmList1){
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> gcmList1=ManagementFactory.getGarbageCollectorMXBeans();
for(GarbageCollectorMXBean gcm:gcmList1){
System.out.println("getName "+gcm.getName());
System.out.println("getMemoryPoolNames "+gcm.getMemoryPoolNames());
}
//获取运行时信息
System.out.println("=======================RuntimeMXBean============================ ");
RuntimeMXBean rmb1=(RuntimeMXBean)ManagementFactory.getRuntimeMXBean();
System.out.println("getClassPath "+rmb1.getClassPath());
System.out.println("getLibraryPath "+rmb1.getLibraryPath());
System.out.println("getVmVersion "+rmb1.getVmVersion());
}
}