Sorting an ArrayList in Java

Question

I have a code with a class name Car.

public class Car{

    private String carName;
    private String carDesc;
    private int quantity;

    public String getCarName() {
        return carName;
    }
    public void setCarName(String carName) {
        this.carName = carName;
    }
    public String getCarDesc() {
        return carDesc;
    }
    public void setCarDesc(String carDesc) {
        this.carDesc = carDesc;
    }
    public int getQuantity() {
        return quantity;
    }
    public void setQuantity(int quantity) {
        this.quantity = quantity;
    }
}

Now, using the for loop,  I am creating a creating a list of class “Car”.

List<Car>  cars= new ArrayList<Car>();

Car car;
for(int i=0;i<100;i++)
{
   car= new car();
   car.setname(...);
   cars.add(car);
}

My list contains a few car names added to it.

Can someone help me in sorting this arrayList based on the car names of each object in the list?

Answer 1

You can easily do this by simply using a  “Comparator”. Check out the code below:

List<Car> cars = new ArrayList<Car>();

Car car;
for(int i = 0; i < 100; i++)
{
  car = new Car();
  car.setname(...);
  cars.add(car);
}

// Sorting
Collections.sort(cars, new Comparator<Car>() {
        @Override
        public int compare(Car car2, Car car1)
        {

            return  car1.carName.compareTo(car2.carName);
        }
    });

Hope this works for you, as it worked for me.