The management interface for the runtime system of
the Java virtual machine.
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#getRuntimeMXBean
method or
from the platform MBeanServer
method.
The ObjectName for uniquely identifying the MXBean for
the runtime system within an MBeanServer is:
java.lang:type=Runtime
This interface defines several convenient methods for accessing
system properties about the Java virtual machine.
Returns the boot class path that is used by the bootstrap class loader
to search for class files.
Multiple paths in the boot class path are separated by the
path separator character of the platform on which the Java
virtual machine is running.
A Java virtual machine implementation may not support
the boot class path mechanism for the bootstrap class loader
to search for class files.
The #isBootClassPathSupported
method can be used
to determine if the Java virtual machine supports this method.
Returns the Java class path that is used by the system class loader
to search for class files.
This method is equivalent to
.
Multiple paths in the Java class path are separated by the
path separator character of the platform of the Java virtual machine
being monitored.
Returns the input arguments passed to the Java virtual machine
which does not include the arguments to the
main method.
This method returns an empty list if there is no input argument
to the Java virtual machine.
Some Java virtual machine implementations may take input arguments
from multiple different sources: for examples, arguments passed from
the application that launches the Java virtual machine such as
the 'java' command, environment variables, configuration files, etc.
Typically, not all command-line options to the 'java' command
are passed to the Java virtual machine.
Thus, the returned input arguments may not
include all command-line options.
MBeanServer access:
The mapped type of List is String[].
Returns the Java library path.
This method is equivalent to
.
Multiple paths in the Java library path are separated by the
path separator character of the platform of the Java virtual machine
being monitored.
Returns the version of the specification for the management interface
implemented by the running Java virtual machine.
Returns the name representing the running Java virtual machine.
The returned name string can be any arbitrary string and
a Java virtual machine implementation can choose
to embed platform-specific useful information in the
returned name string. Each running virtual machine could have
a different name.
Returns the Java virtual machine specification name.
This method is equivalent to
.
Returns the Java virtual machine specification vendor.
This method is equivalent to
.
Returns the Java virtual machine specification version.
This method is equivalent to
.
Returns the start time of the Java virtual machine in milliseconds.
This method returns the approximate time when the Java virtual
machine started.
Returns a map of names and values of all system properties.
This method calls
System#getProperties
to get all
system properties. Properties whose name or value is not
a
String are omitted.
MBeanServer access:
The mapped type of Map is
TabularData
with two items in each row as follows:
| Item Name |
Item Type |
| key |
String |
| value |
String |
Returns the uptime of the Java virtual machine in milliseconds.
Returns the Java virtual machine implementation name.
This method is equivalent to
.
Returns the Java virtual machine implementation vendor.
This method is equivalent to
.
Returns the Java virtual machine implementation version.
This method is equivalent to
.
Tests if the Java virtual machine supports the boot class path
mechanism used by the bootstrap class loader to search for class
files.