Package org.apache.juneau.commons.utils

Class SystemUtils

java.lang.Object

org.apache.juneau.commons.utils.SystemUtils

public class SystemUtils
extends Object

System utilities.

Method Summary

Modifier and Type	Method	Description
static StringSetting	env(String name)	Looks up a system property or environment variable.
static <T> T	env(String name, T def)	Looks up a system property or environment variable, returning a default if not found.
static void	shutdownMessage(Supplier<String> message)	Adds a console message to display when the JVM shuts down.

Methods inherited from class java.lang.Object

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

Method Details

shutdownMessage

public static void shutdownMessage(Supplier<String> message)

Adds a console message to display when the JVM shuts down.

Parameters:

message - The message to display. Must not be null (evaluated at JVM shutdown).

env

public static StringSetting env(String name)

Looks up a system property or environment variable.

Parameters:

name - The property name.

Returns:

A StringSetting wrapping the value.

env

public static <T> T env(String name,
 T def)

Looks up a system property or environment variable, returning a default if not found.

Type Parameters:

T - The type to convert the value to.

Parameters:

name - The property name.

def - The default value. Can be null (returned as-is when the property is not found).

Returns:

The found value, or the default.