Interface RuntimeMXBean

public String getBootClassPath()

Returns the boot classpath used by the virtual machine. This value follows the standard path syntax used by the underlying operating system (e.g. directories separated by ':' on UNIX or ';' on Windows).

Supplying this value is optional. Users should check the return value of isBootClassPathSupported() prior to calling this method.

Returns:

the boot classpath of the virtual machine, if supported.

Throws:

UnsupportedOperationException - in cases where this functionality is not supported by the VM.

SecurityException - if a security manager exists and denies ManagementPermission("monitor").

See Also:

isBootClassPathSupported(), ManagementPermission

public String getClassPath()

Returns the classpath used by the system classloader. This is equivalent to obtaining the java.class.path property via System.getProperty(String). This value follows the standard path syntax used by the underlying operating system (e.g. directories separated by ':' on UNIX or ';' on Windows).

Returns:

the classpath used by the system class loader.

Throws:

SecurityException - if a security manager exists which prevents access to the classpath property.

See Also:

System.getProperty(String), SecurityManager.checkPropertyAccess(String)

public List getInputArguments()

Returns a list of the arguments given to the virtual machine, excluding those that apply to the main() method of the class file being executed. These may not just be those specified at the command line, but may also include arguments from environment variables, configuration files, etc. All command line arguments may not reach the virtual machine, so these are not included in this list.

Returns:

a list of arguments passed to the virtual machine.

Throws:

SecurityException - if a security manager exists and denies ManagementPermission("monitor").

See Also:

ManagementPermission

public String getLibraryPath()

Returns the library path. This is equivalent to obtaining the java.library.path property via System.getProperty(String). This value follows the standard path syntax used by the underlying operating system (e.g. directories separated by ':' on UNIX or ';' on Windows).

Returns:

the library path.

Throws:

SecurityException - if a security manager exists which prevents access to the library path property.

See Also:

System.getProperty(String), SecurityManager.checkPropertyAccess(String)

public String getManagementSpecVersion()

Returns the version of the management specification implemented by the virtual machine.

Returns:

the version of the management specification implemented.

public String getName()

Returns the name of this virtual machine. The content of this property is left up to the developer of the virtual machine. It may include a number of system attributes and may differ between instances of the same virtual machine (for example, it might include the process identifier or the host name of the machine on which it is running). The intention is that this name refers to the precise entity that the other data supplied by this bean refers to, rather than the VM in general.

Returns:

the name of this virtual machine.

public String getSpecName()

Returns the specification name of the virtual machine. This is equivalent to obtaining the java.vm.specification.name property via System.getProperty(String).

Returns:

the specification name of the VM.

Throws:

SecurityException - if a security manager exists which prevents access to the VM specification name property.

See Also:

System.getProperty(String), SecurityManager.checkPropertyAccess(String)

public String getSpecVendor()

Returns the specification vendor of the virtual machine. This is equivalent to obtaining the java.vm.specification.vendor property via System.getProperty(String).

Returns:

the specification vendor of the VM.

Throws:

SecurityException - if a security manager exists which prevents access to the VM specification vendor property.

See Also:

System.getProperty(String), SecurityManager.checkPropertyAccess(String)

public String getSpecVersion()

Returns the specification version of the virtual machine. This is equivalent to obtaining the java.vm.specification.version property via System.getProperty(String).

Returns:

the specification version of the VM.

Throws:

SecurityException - if a security manager exists which prevents access to the VM specification version property.

See Also:

System.getProperty(String), SecurityManager.checkPropertyAccess(String)

public long getStartTime()

Returns the approximate start time of the virtual machine in milliseconds.

Returns:

the start time of the virtual machine.

public Map getSystemProperties()

Returns a map containing the keys and values of the system properties. This gives largely the same result as calling System.getProperties(), but the resulting map is filtered so as to only provide keys and values that are Strings.

Returns:

the map of system properties.

public long getUptime()

Returns the uptime of the virtual machine in milliseconds.

Returns:

the uptime of the virtual machine.

public String getVmName()

Returns the implementation name of the virtual machine. This is equivalent to obtaining the java.vm.name property via System.getProperty(String).

Returns:

the implementation name of the VM.

Throws:

SecurityException - if a security manager exists which prevents access to the VM name property.

See Also:

System.getProperty(String), SecurityManager.checkPropertyAccess(String)

public String getVmVendor()

Returns the implementation vendor of the virtual machine. This is equivalent to obtaining the java.vm.vendor property via System.getProperty(String).

Returns:

the implementation vendor of the VM.

Throws:

SecurityException - if a security manager exists which prevents access to the VM vendor property.

See Also:

System.getProperty(String), SecurityManager.checkPropertyAccess(String)

public String getVmVersion()

Returns the implementation version of the virtual machine. This is equivalent to obtaining the java.vm.version property via System.getProperty(String).

Returns:

the implementation version of the VM.

Throws:

SecurityException - if a security manager exists which prevents access to the VM version property.

See Also:

System.getProperty(String), SecurityManager.checkPropertyAccess(String)

public boolean isBootClassPathSupported()

Returns true if the virtual machine supports the boot classpath mechanism.

Returns:

true if the boot classpath property is supported by the virtual machine.