1.Write a class named Car that has the following fields: yearModel. The yearMode
ID: 3718925 • Letter: 1
Question
1.Write a class named Car that has the following fields:
yearModel. The yearModel field is an int that holds the car’s year model.
make. The make field references a String object that holds the make of the car.
speed. The speed field is an int that holds the car’s current speed.
In addition, the class should have the following constructor and other methods:
Constructor. The constructor should accept the car’s year model and make as arguments. These values should be assigned to the object’s yearModel and make fields. The constructor should also assign 0 to the speed field.
Accessors. Appropriate accessor methods should get the values stored in an object’s yearModel, make, and speed fields.
Create a method called accelerate. The accelerate method should add 7 to the speed each time it is called.
Create a method called brake. The brake method should subtract 5 from the speed each time it is called.
2. Create a GUI with the following elements:
A label and text field showing the yearModel
A label and text field showing the make
A label and text field showing the speed
A button that accelerates the car and displays the new speed
A button that brakes the car and displays the new speed
Implement the GUI in a separate class called CarView which takes a car in it's constructor.
Given each GUI widget a meaningfull name, such as yearModelLabel and yearModelField.
Also, implement the ActionListeners for the buttons either as a private nested class or as anonymous inner classes. Use setText to update the contents of the text fields.
Write a comment for each line within a method
Explanation / Answer
public class Car {
private int yearModel;
private String make;
private int speed;
// The constructor accept the car's year model and make as argument
// The constuctor should assign 0 to the speed field
public Car (int yrModel, String carMake)
{
yearModel = yrModel;
make = carMake;
speed = 0;
}
public void setyearModel(int yrModel)
{
yearModel = yrModel;
}
public void setMake (String carMake)
{
make = carMake;
}
public void setSpeed(int carSpeed)
{
speed = carSpeed;
}
public int getYearModel()
{
return yearModel;
}
public String getMake ()
{
return make;
}
public int getSpeed ()
{
return speed;
}
public void AccelerateSpeed (int speed)
{
speed = speed + 5;
}
public void BrakeSpeed (int speed)
{
speed = speed - 5;
}
}
]
[/import javax.swing.JOptionPane;
public class MyNewCar {
public static void main(String[] args) {
Car myCar = new Car (2010, "Honda");
int speed = myCar.getSpeed();
speed = Integer.parseInt(JOptionPane.showInputDialog("Enter Your Speed" ));
for (int i = 0; i < 5; i++)
{
System.out.println("The" + " " + myCar.getYearModel() + " " + myCar.getMake() +
" " + "is going " );
myCar.AccelerateSpeed(speed);
System.out.println("Your Speed now is: " + speed);
}
speed = Integer.parseInt(JOptionPane.showInputDialog("Enter Your Speed" ));
for (int i = 0; i < 5; i++)
{
System.out.println("The" + " " + myCar.getYearModel() + " " + myCar.getMake() +
" " + "is going " );
myCar.BrakeSpeed(speed);
System.out.println("Your Speed now is: " + speed);
}
}
}
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