A L M N P S T

A

actionPerformed(ActionEvent) - Method in class NextButtonListener

The action performed when a push of the button is detected: send a next message to the Sequencer to advance it to its next state.

L

Lens - class Lens.

A Lens has a certain color and can either be turned on (the color) or turned off (black).

Lens(Color) - Constructor for class Lens

Construct a Lens to display a given color.

M

main(String[]) - Static method in class TrafficLight

The traffic light simulation starts at main.

N

next() - Method in class Sequencer

How the light changes when a next Button is pressed depends on the current state.

NextButtonListener - class NextButtonListener.

A NextButtonListener sends a "next" message to its Sequencer each time a button to which it is listening is pressed.

NextButtonListener(Sequencer) - Constructor for class NextButtonListener

Construct a listener that "listens for" a user's pressing the "Next" button.

P

paint(Graphics) - Method in class Lens

How this Lens paints itself.

S

Sequencer - class Sequencer.

A Sequencer controls a TrafficLight.

Sequencer(TrafficLight) - Constructor for class Sequencer

Construct a sequencer to control a TrafficLight.

setCaution() - Method in class TrafficLight

Set the light to caution (yellow).

setGo() - Method in class TrafficLight

Set the light to go (green).

setStop() - Method in class TrafficLight

Set the light to stop (red).

setWalk() - Method in class TrafficLight

Set the light to walk.

T

TrafficLight - class TrafficLight.

A TrafficLight has three lenses: red, yellow and green.

TrafficLight() - Constructor for class TrafficLight

Construct a traffic light.

turnOff() - Method in class Lens

Darken this lens.

turnOn() - Method in class Lens

Have this Lens display its color.

A L M N P S T