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 Params
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