scala.sys

package scala.sys

Type members

Classlikes

trait BooleanProp extends Prop[Boolean]

A few additional conveniences for Boolean properties.

A few additional conveniences for Boolean properties.

Companion:
object
Source:
BooleanProp.scala
Companion:
class
Source:
BooleanProp.scala
trait Prop[+T]

A lightweight interface wrapping a property contained in some unspecified map.

A lightweight interface wrapping a property contained in some unspecified map. Generally it'll be the system properties but this is not a requirement.

See scala.sys.SystemProperties for an example usage.

Companion:
object
Source:
Prop.scala
object Prop
Companion:
class
Source:
Prop.scala

A minimal Thread wrapper to enhance shutdown hooks.

A minimal Thread wrapper to enhance shutdown hooks. It knows how to unregister itself.

Companion:
object
Source:
ShutdownHookThread.scala

A bidirectional map wrapping the java System properties.

A bidirectional map wrapping the java System properties. Changes to System properties will be immediately visible in the map, and modifications made to the map will be immediately applied to the System properties. If a security manager is in place which prevents the properties from being read or written, the AccessControlException will be caught and discarded.

Companion:
object
Source:
SystemProperties.scala

The values in SystemProperties can be used to access and manipulate designated system properties.

The values in SystemProperties can be used to access and manipulate designated system properties. See scala.sys.Prop for particulars.

Example:

if (!headless.isSet) headless.enable()
Companion:
class
Source:
SystemProperties.scala

Value members

Concrete methods

Register a shutdown hook to be run when the VM exits.

Register a shutdown hook to be run when the VM exits. The hook is automatically registered: the returned value can be ignored, but is available in case the Thread requires further modification. It can also be unregistered by calling ShutdownHookThread#remove().

Note that shutdown hooks are NOT guaranteed to be run.

Value parameters:
body

the body of code to run at shutdown

Returns:

the Thread which will run the shutdown hook.

See also:
Source:
package.scala

Returns all active thread in the current thread's thread group and subgroups.

Returns all active thread in the current thread's thread group and subgroups.

Returns:

an IndexedSeq containing the threads.

Source:
package.scala

An immutable Map representing the current system environment.

An immutable Map representing the current system environment.

If lookup fails, use System.getenv(_) for case-insensitive lookup on a certain platform. If that also fails, throw NoSuchElementException.

Returns:

a Map containing the system environment variables.

Source:
package.scala
def error(message: String): Nothing

Throw a new RuntimeException with the supplied message.

Throw a new RuntimeException with the supplied message.

Returns:

Nothing.

Source:
package.scala
def exit(): Nothing

Exit the JVM with the default status code.

Exit the JVM with the default status code.

Returns:

Nothing.

Source:
package.scala
def exit(status: Int): Nothing

Exit the JVM with the given status code.

Exit the JVM with the given status code.

Returns:

Nothing.

Source:
package.scala

A bidirectional, mutable Map representing the current system Properties.

A bidirectional, mutable Map representing the current system Properties.

Returns:

a SystemProperties.

See also:
Source:
package.scala

A convenience method to get the current Runtime instance.

A convenience method to get the current Runtime instance.

Returns:

the result of java.lang.Runtime.getRuntime()

Source:
package.scala