Question

Use the class definition below to answer the following questions. [Total 8 Marks]

public class TrafficLight {

String stopLight = "red";

String waitLight;

String goLight;

public void setStopLight(String colour) {

stopLight = colour; }

public String getGreenLight() {

return goLight; } }

1 :How many field attributes are there in the TrafficLight class?

2 :Name a field attribute for this class.

3 :What is the name of the method that is an accessor?

4 :What is the name of the method that is a mutator?

5 :What is the output type for the setStopLight method ?

6 :Write a Constructor for the TrafficLight class that sets stopLight value to “red”, waitLight to “yellow” and goLight to “green”?

Answer 1

How many field attributes are there in the TrafficLight class?
Answer: 3

Name a field attribute for this class.
Answer: stopLight

What is the name of the method that is an accessor?
Answer: getGreenLight

What is the name of the method that is a mutator?
Answer: setStopLight

What is the output type for the setStopLight method
Answer: void

Write a Constructor for the TrafficLight class that sets stopLight value to “red”, waitLight to “yellow” and goLight to “green”?
public TrafficLight() {
    stopLight = "red";
    waitLight = "yellow";
    goLight = "green";
}