import java.util.Arrays;
public class Main {
public static void main(String[] args) {
Car car1 = new Car("A", 5000);
Car car2 = new Car("B", 5000);
Car car3 = new Car("C", 4000);
System.out.println("Car 1 equals Car 2: " + car1.compareTo(car2));
System.out.println("Car 1 equals Car 3: " + car1.compareTo(car3));
System.out.println("Car 2 equals Car 3: " + car2.compareTo(car3));
Car[] carArray = new Car[] { car1, car2, car3 };
Arrays.sort(carArray);
for (Car car : carArray)
System.out.println(car.toString());
}
}
class Car implements Comparable {
private String make;
private int mileage;
public Car(String make, int mileage) {
this.make = make;
this.mileage = mileage;
}
public int compareTo(Object obj) {
if (obj instanceof Car) {
Car car = (Car) obj;
if (this.mileage > car.getMileage())
return 1;
else if (this.mileage < car.getMileage())
return -1;
}
return 0;
}
public int getMileage() {
return mileage;
}
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append("Make: " + make + ",Mileage: " + mileage);
return buffer.toString();
}
}