Package org.opentrafficsim.road.network.object.trafficlight

Enum Class TrafficLightColor

java.lang.Object

java.lang.Enum<TrafficLightColor>

org.opentrafficsim.road.network.object.trafficlight.TrafficLightColor

All Implemented Interfaces:

Serializable, Comparable<TrafficLightColor>, Constable

public enum TrafficLightColor
extends Enum<TrafficLightColor>

The colors for a normal traffic light.

Copyright (c) 2013-2026 Delft University of Technology, PO Box 5, 2600 AA, Delft, the Netherlands. All rights reserved.
BSD-style license. See OpenTrafficSim License.

Author:

Alexander Verbraeck, Peter Knoppers, Wouter Schakel

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
BLACK	Traffic light is not working.
GREEN	GTU is allowed to drive.
PREGREEN	Pre-green indication.
RED	GTU needs to stop.
YELLOW	GTU is allowed to continue if it cannot stop anymore.

Method Summary

Modifier and Type	Method	Description
final boolean	isBlack()	Returns whether the light is black (off).
final boolean	isGreen()	Returns whether the light is green.
final boolean	isPreGreen()	Returns whether the light is pre-green.
final boolean	isRed()	Returns whether the light is red.
final boolean	isRedOrYellow()	Returns whether the light is red or yellow.
final boolean	isYellow()	Returns whether the light is yellow.
static TrafficLightColor	valueOf(String name)	Returns the enum constant of this class with the specified name.
static TrafficLightColor[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

RED

public static final TrafficLightColor RED

GTU needs to stop.

YELLOW

public static final TrafficLightColor YELLOW

GTU is allowed to continue if it cannot stop anymore.

GREEN

public static final TrafficLightColor GREEN

GTU is allowed to drive.

PREGREEN

public static final TrafficLightColor PREGREEN

Pre-green indication.

BLACK

public static final TrafficLightColor BLACK

Traffic light is not working.

Method Details

values

public static TrafficLightColor[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static TrafficLightColor valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

isRedOrYellow

public final boolean isRedOrYellow()

Returns whether the light is red or yellow.

Returns:

whether the light is red or yellow.

isRed

public final boolean isRed()

Returns whether the light is red.

Returns:

whether the light is red.

isYellow

public final boolean isYellow()

Returns whether the light is yellow.

Returns:

whether the light is yellow.

isGreen

public final boolean isGreen()

Returns whether the light is green.

Returns:

whether the light is green.

isPreGreen

public final boolean isPreGreen()

Returns whether the light is pre-green.

Returns:

whether the light is pre-green.

isBlack

public final boolean isBlack()

Returns whether the light is black (off).

Returns:

whether the light is black (off).