|
Java™ Platform Standard Ed. 6 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
public interface RuntimeMXBean
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.
Method Summary | |
---|---|
String |
getBootClassPath()
Returns the boot class path that is used by the bootstrap class loader to search for class files. |
String |
getClassPath()
Returns the Java class path that is used by the system class loader to search for class files. |
List<String> |
getInputArguments()
Returns the input arguments passed to the Java virtual machine which does not include the arguments to the main method. |
String |
getLibraryPath()
Returns the Java library path. |
String |
getManagementSpecVersion()
Returns the version of the specification for the management interface implemented by the running Java virtual machine. |
String |
getName()
Returns the name representing the running Java virtual machine. |
String |
getSpecName()
Returns the Java virtual machine specification name. |
String |
getSpecVendor()
Returns the Java virtual machine specification vendor. |
String |
getSpecVersion()
Returns the Java virtual machine specification version. |
long |
getStartTime()
Returns the start time of the Java virtual machine in milliseconds. |
Map<String,String> |
getSystemProperties()
Returns a map of names and values of all system properties. |
long |
getUptime()
Returns the uptime of the Java virtual machine in milliseconds. |
String |
getVmName()
Returns the Java virtual machine implementation name. |
String |
getVmVendor()
Returns the Java virtual machine implementation vendor. |
String |
getVmVersion()
Returns the Java virtual machine implementation version. |
boolean |
isBootClassPathSupported()
Tests if the Java virtual machine supports the boot class path mechanism used by the bootstrap class loader to search for class files. |
Method Detail |
---|
String getName()
String getVmName()
System.getProperty("java.vm.name")
.
SecurityException
- if a security manager exists and its
checkPropertiesAccess
method doesn't allow access
to this system property.SecurityManager.checkPropertyAccess(java.lang.String)
,
System.getProperty(java.lang.String)
String getVmVendor()
System.getProperty("java.vm.vendor")
.
SecurityException
- if a security manager exists and its
checkPropertiesAccess
method doesn't allow access
to this system property.SecurityManager.checkPropertyAccess(java.lang.String)
,
System.getProperty(java.lang.String)
String getVmVersion()
System.getProperty("java.vm.version")
.
SecurityException
- if a security manager exists and its
checkPropertiesAccess
method doesn't allow access
to this system property.SecurityManager.checkPropertyAccess(java.lang.String)
,
System.getProperty(java.lang.String)
String getSpecName()
System.getProperty("java.vm.specification.name")
.
SecurityException
- if a security manager exists and its
checkPropertiesAccess
method doesn't allow access
to this system property.SecurityManager.checkPropertyAccess(java.lang.String)
,
System.getProperty(java.lang.String)
String getSpecVendor()
System.getProperty("java.vm.specification.vendor")
.
SecurityException
- if a security manager exists and its
checkPropertiesAccess
method doesn't allow access
to this system property.SecurityManager.checkPropertyAccess(java.lang.String)
,
System.getProperty(java.lang.String)
String getSpecVersion()
System.getProperty("java.vm.specification.version")
.
SecurityException
- if a security manager exists and its
checkPropertiesAccess
method doesn't allow access
to this system property.SecurityManager.checkPropertyAccess(java.lang.String)
,
System.getProperty(java.lang.String)
String getManagementSpecVersion()
String getClassPath()
System.getProperty("java.class.path")
.
Multiple paths in the Java class path are separated by the path separator character of the platform of the Java virtual machine being monitored.
SecurityException
- if a security manager exists and its
checkPropertiesAccess
method doesn't allow access
to this system property.SecurityManager.checkPropertyAccess(java.lang.String)
,
System.getProperty(java.lang.String)
String getLibraryPath()
System.getProperty("java.library.path")
.
Multiple paths in the Java library path are separated by the path separator character of the platform of the Java virtual machine being monitored.
SecurityException
- if a security manager exists and its
checkPropertiesAccess
method doesn't allow access
to this system property.SecurityManager.checkPropertyAccess(java.lang.String)
,
System.getProperty(java.lang.String)
boolean isBootClassPathSupported()
String getBootClassPath()
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.
UnsupportedOperationException
- if the Java virtual machine does not support this operation.
SecurityException
- if a security manager exists and the caller does not have
ManagementPermission("monitor").List<String> getInputArguments()
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
SecurityException
- if a security manager exists and the caller does not have
ManagementPermission("monitor").long getUptime()
long getStartTime()
Map<String,String> getSystemProperties()
System.getProperties()
to get all
system properties. Properties whose name or value is not
a String are omitted.
MBeanServer access:
The mapped type of MapTabularData
with two items in each row as follows:
Item Name Item Type key String value String
SecurityException
- if a security manager exists and its
checkPropertiesAccess
method doesn't allow access
to the system properties.
|
Java™ Platform Standard Ed. 6 |
|||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
Copyright © 1993, 2010, Oracle and/or its affiliates. All rights reserved.