public class Runtime extends Object
Runtimethat allows the application to interface with the environment in which the application is running. The current runtime can be obtained from the
An application cannot create its own instance of this class.
|Modifier and Type||Method and Description|
Terminates the currently running Java virtual machine by initiating its shutdown sequence.
Returns the amount of free memory in the Java Virtual Machine.
Runs the garbage collector.
Returns the runtime object associated with the current Java application.
Returns the maximum amount of memory that the Java virtual machine will attempt to use.
Returns the total amount of memory in the Java virtual machine.
public void exit(int status)
System.exit method is the
conventional and convenient means of invoking this method.
status- Termination status. By convention, a nonzero status code indicates abnormal termination.
SecurityException- If a security manager is present and its
checkExitmethod does not permit exiting with the specified status
public long freeMemory()
gcmethod may result in increasing the value returned by
public void gc()
gc stands for "garbage
collector". The virtual machine performs this recycling
process automatically as needed, in a separate thread, even if the
gc method is not invoked explicitly.
System.gc() is the conventional and convenient
means of invoking this method.
public static Runtime getRuntime()
Runtimeare instance methods and must be invoked with respect to the current runtime object.
Runtimeobject associated with the current Java application.
public long maxMemory()
Long.MAX_VALUEwill be returned.
public long totalMemory()
Note that the amount of memory required to hold an object of any given type may be implementation-dependent.
Copyright (c) 2014, Oracle and/or its affiliates. All Rights Reserved. Use of this specification is subject to license terms.