OpenJDK 27 · java.lang.management.OperatingSystemMXBean

The management interface for the operating system on which the Java virtual machine is running.

A Java virtual machine has a single instance of the implementation class of this interface. This instance implementing this interface is an MXBean that can be obtained by calling the ManagementFactory#getOperatingSystemMXBean method or from the platform MBeanServer method.

The ObjectName for uniquely identifying the MXBean for the operating system within an MBeanServer is:

java.lang:type=OperatingSystem

It can be obtained by calling the PlatformManagedObject#getObjectName method.

This interface defines several convenient methods for accessing system properties about the operating system on which the Java virtual machine is running.

Method Summary

Modifier and Type	Method and Description
public String	Returns: the operating system architecture. getArch() Returns the operating system architecture.
public int	Returns: the number of processors available to the virtual machine; never smaller than one. getAvailableProcessors() Returns the number of processors available to the Java virtual machine.
public String	Returns: the operating system name. getName() Returns the operating system name.
public double	Returns: the system load average; or a negative value if not available. getSystemLoadAverage() Returns the system load average for the last minute.
public String	Returns: the operating system version. getVersion() Returns the operating system version.

Inherited from java.lang.management.PlatformManagedObject:: getObjectName

Method Detail

getArch back to summary

getArch	back to summary
public String getArch() Returns the operating system architecture. This method is equivalent to `System.getProperty("os.arch")`. Returns:String the operating system architecture. See Also `java.lang.System#getProperty`

public String getArch()

Returns the operating system architecture. This method is equivalent to System.getProperty("os.arch").

Returns:String: the operating system architecture.
See Also: java.lang.System#getProperty

getAvailableProcessors back to summary

getAvailableProcessors	back to summary
public int getAvailableProcessors() Returns the number of processors available to the Java virtual machine. This method is equivalent to the `Runtime#availableProcessors()` method. This value may change during a particular invocation of the virtual machine. Returns:int the number of processors available to the virtual machine; never smaller than one.

public int getAvailableProcessors()

Returns the number of processors available to the Java virtual machine. This method is equivalent to the Runtime#availableProcessors() method.

This value may change during a particular invocation of the virtual machine.

Returns:int: the number of processors available to the virtual machine; never smaller than one.

getName back to summary

getName	back to summary
public String getName() Returns the operating system name. This method is equivalent to `System.getProperty("os.name")`. Returns:String the operating system name. See Also `java.lang.System#getProperty`

public String getName()

Returns the operating system name. This method is equivalent to System.getProperty("os.name").

Returns:String: the operating system name.
See Also: java.lang.System#getProperty

getSystemLoadAverage	back to summary
public double getSystemLoadAverage() Returns the system load average for the last minute. The system load average is the sum of the number of runnable entities queued to the available processors and the number of runnable entities running on the available processors averaged over a period of time. The way in which the load average is calculated is operating system specific but is typically a damped time-dependent average. If the load average is not available, a negative value is returned. This method is designed to provide a hint about the system load and may be queried frequently. The load average may be unavailable on some platform where it is expensive to implement this method. Returns:double the system load average; or a negative value if not available. Since 1.6

getSystemLoadAverage

back to summary

public double getSystemLoadAverage()

Returns the system load average for the last minute. The system load average is the sum of the number of runnable entities queued to the available processors and the number of runnable entities running on the available processors averaged over a period of time. The way in which the load average is calculated is operating system specific but is typically a damped time-dependent average.

If the load average is not available, a negative value is returned.

This method is designed to provide a hint about the system load and may be queried frequently. The load average may be unavailable on some platform where it is expensive to implement this method.

Returns:double: the system load average; or a negative value if not available.
Since: 1.6

getVersion back to summary

getVersion	back to summary
public String getVersion() Returns the operating system version. This method is equivalent to `System.getProperty("os.version")`. Returns:String the operating system version. See Also `java.lang.System#getProperty`

public String getVersion()

Returns the operating system version. This method is equivalent to System.getProperty("os.version").

Returns:String: the operating system version.
See Also: java.lang.System#getProperty

public Interface OperatingSystemMXBean

Method Summary

Method Detail