sorting Set - program hangs

public class Car implements Comparator<Car>{  
	
	private String model;
	private int year;
	
	public int compare(Car c1, Car c2){
		//return c2.getModel().compareTo(c1.getModel()); //sort by model
		return c2.getYear() - c1.getYear();  //sort by Year
	}

	public String getModel() {
		return model;
	}

	public void setModel(String model) {
		this.model = model;
	}

	public int getYear() {
		return year;
	}

	public void setYear(int year) {
		this.year = year;
	}

public static class MyCarTest{
Car c1 = new Car();		
Car c2 = new Car();
Set<Car> carSet = new HashSet<>();
		
private void addSet(){
			c1.setModel("Mercedes");
			c1.setYear(2012);
			
			c2.setModel("BMW");  //BMW
			c2.setYear(2013);    // 2014
			
			carSet.add(c1);
			carSet.add(c2);
			
			List<Car> carList = new ArrayList<Car>(carSet);
			//Collections.sort(carList);
			for(Car cars : carSet){
			System.out.println("Cars in set are>>" +cars.getModel() + "-"+ cars.getYear() );
			}
		}
public static void main(String[] args){
		MyCarTest test = new MyCarTest();
		test.addSet();
	}

Select allOpen in new window