java.lang

Class Runtime

java.lang.Object

java.lang.Runtime

public class Runtime
extends Object

Minimalist version of the standard Java Runtime class.

Author:

Paul Andrews

Method Summary

Modifier and Type	Method and Description
void	addShutdownHook(Thread hook) Add a shutdown hook.
void	exit(int code) Terminate the application.
long	freeMemory() Return the amount of free memory.on the heap
static Runtime	getRuntime() Get the single instance of us.
void	halt(int code) Terminate the application immediately
boolean	removeShutdownHook(Thread hook) Remove a previously installed shutdown hook from the system.
long	totalMemory() Return the size of the heap in bytes.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

addShutdownHook

public void addShutdownHook(Thread hook)

Add a shutdown hook. Shutdown hooks are run just before the VM terminates.

Parameters:

hook -

exit

public void exit(int code)

Terminate the application.

freeMemory

public long freeMemory()

Return the amount of free memory.on the heap

Returns:

the free memory in bytes

getRuntime

public static Runtime getRuntime()

Get the single instance of us.

halt

public void halt(int code)

Terminate the application immediately

removeShutdownHook

public boolean removeShutdownHook(Thread hook)

Remove a previously installed shutdown hook from the system.

Parameters:

hook -

Returns:

true if the hook was removed false if not

totalMemory

public long totalMemory()

Return the size of the heap in bytes.

Returns:

the free memory in bytes