Car.java

// A Java program to demonstrate that we can swap two 
// objects be swapping members. 
  
// A car with number class Car 
class Car 
{ 
    int no; 
    Car(int no) { this.no = no; } 
} 
  
// A class that uses Car objects 
public class Main 
{ 
    // To swap c1 and c2 
    public static void swap(Car c1, Car c2) 
    { 
        int temp = c1.no; 
        c1.no = c2.no; 
        c2.no = temp; 
    } 
  
    // Driver method 
    public static void main(String[] args) 
    { 
        Car c1 = new Car(1); 
        Car c2 = new Car(2); 
        swap(c1, c2); 
        System.out.println("c1.no = " + c1.no); 
        System.out.println("c2.no = " + c2.no); 
    } 
}