Swap.java

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// 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 
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); 
	} 
}