//  File:  AssignmentDemo.java

//  Shows the effect of the assignment operator "=" when applied to object
//  variables.  Remember that an object variable stores a "reference to" an
//  object (i.e. the address of the object).

/**
 * A class to represent a car of a specific make and color.
 */
class Ride 
{
	// instance variables
	private String make ;		// the make of the car				 
	private String color ;		// the color
	
	/**
	 * Creates a Ride object.
	 * @param theMake the make of the ride
	 * @param theColor the color of the ride
	 */
	public Ride(String theMake, String theColor)	
	{				
		make = theMake ;
		color = theColor ;
	}
		
	/**
	 * Paint Ride object a new color.
	 * @param newColor the new color
	 */
	public void paint(String newColor)
	{	
		color = newColor ;
	}
	
	/**
	 * Converts a Ride object to a String.
	 * @return a String containing the make and color of the ride
	 */
	public String toString()	
	{								
		return color + " " + make ; 
	}
}

/**
 * Test class shows effect of assignment statement with objects
 */
public class AssignmentDemo 
{
	public static void main(String args[]) 
	{
		Ride myRide = new Ride("Tesla", "Teal") ;
		
		Ride yourRide = new Ride("Ferrari", "Fuchsia") ;					
		
		System.out.println( "myRide is a " + myRide.toString() ) ;
		
		System.out.println( "yourRide is a " + yourRide.toString() ) ;

		yourRide = myRide ; 		
		// Note: now both obj var's point to same car object
        
      System.out.println("\nAfter assigning \"yourRide = myRide\"...\n") ;
		
		System.out.println( "myRide is a " + myRide.toString() ) ;
		
		System.out.println( "yourRide is a " + yourRide.toString() ) ;

		// paint my car purple
      myRide.paint("Tangerine") ;			
        
      System.out.println("\nAfter painting ONLY myRide Tangerine...\n") ;
		
		System.out.println( "myRide is a " + myRide.toString() ) ;
		
		System.out.println( "yourRide is a " + yourRide ) ;
		// Note: toString() called implicitly ^^^^^^^
	}	                   
}

/*  program output:

myRide is a Teal Tesla
yourRide is a Fuchsia Ferrari

After assigning "yourRide = myRide"...

myRide is a Teal Tesla
yourRide is a Teal Tesla

After painting ONLY myRide Tangerine...

myRide is a Tangerine Tesla
yourRide is a Tangerine Tesla

*/