Vehicle.java

import java.util.Random;

/**
 * @author Parth Patel #500893723
 * Vehicle class 
 * This is the superclass to all the extended classes
 *
 */


public class Vehicle 
{
	/**
	 * Instance variable mfr is manufacturer name of the Vehicle
	 * Instance variable color is the Color of car
	 * Instance variable power is the power source of the Vehicle
	 * Instance variable numWheels is the number of wheels
	 */
	private String mfr;						
	private String color; 					
	private int power;						
	private int numWheels;					
	public final int ELECTRIC_MOTOR = 0;	//public integer constant ELECTIRC_MOTOR
	public final int GAS_ENGINE = 1;		//public integer constant GAS_ENGINE
	private int VIN;

	/**
	 * Constructor method to initialize the instance variables
	 * @param mfr is the manufacturer name
	 * @param color is the Color of car
	 * @param power is the power source of the car
	 * @param numWheels is the number of wheels
	 */
	
	public Vehicle(String mfr, String color, int power, int numWheels) 
	{
		Random r = new Random();
		this.mfr = mfr;
		this.color = color;
		this.power = power;
		this.numWheels = numWheels;
		VIN = 100 + r.nextInt(399);
	
	}

	
	/**
	 * @return mfr
	 * returns the string containing manufacturer name
	 */
	public String getMfr() 
	{
		return mfr;
	}

	
	/**
	 * @param mfr1 
	 * sets the mfr variable to the parameter passed to the method
	 */
	public void setMfr(String mfr1) 
	{
		mfr = mfr1;
	}

	
	/**
	 * @return color of the car
	 */
	public String getColor() 
	{
		return color;
	}

	
	/**
	 * @param color
	 * sets the color variable to the parameter passed to the method
	 */
	public void setColor(String color1) 
	{
		color = color1;
	}

	
	/**
	 * @return power 
	 * returns the value of the variable power 
	 */
	public int getPower() 
	{
		return power;
	}

	
	/**
	 * @param power
	 * sets the variable power to the parameter passed to the method
	 */
	public void setPower(int power1) 
	{
		power = power1;
	}
	
	
	/**
	 * @return numWheels
	 * returns the value assigned to the variable numWheels
	 */
	public int getNumWheels() 
	{
		return numWheels;
	}
		
	
	/**
	 * @param numWheels1
	 * sets the variable value to the parameter passed to the method
	 */
	public void setNumWheels(int numWheels1) 
	{
		numWheels = numWheels1;
	}
	
	/**
	 * @return returns a string indicating if the vehicle has a Gas Engine or Electric Motor 
	 * depending upon the input passed in the constructor for the variable power
	 */
	public String getEngineType() 
	{
		int i = getPower();
		if(i == 0)
			return "GAS_ENGINE";
		else if(i == 1)
			return "ELECTRIC_MOTOR";
		else
			return "Invalid input for the variable engineType";
	}
	
	
	/**
	 * @return VIN 
	 * this method returns the VIN number of the car which is generated by the random number object
	 * created in the constructor
	 */
	public int getVIN() 
	{
		return VIN;
	}
		

	/**
	 * @return a string containing the name of manufacturer and the color of the Vehicle
	 */
	public String display() 
	{
		return "VIN: " + getVIN() + " " + getMfr() + " " + getColor();
	}
	
	
	
	
	/**
	 * @param takes an object as a parameter and checks whether two objects are same 
	 * on the basis of their Manufacturer name, Engine type and Number of wheels
	 * of all the variables match then it @returns true, it not it @returns false. 
	 */
	public boolean equals(Object other) 
	{
		Vehicle otherO = (Vehicle)other;
		if((getMfr().equals(otherO.getMfr())) && 
			(getPower() == (otherO.getPower()))&&
			(getNumWheels() == (otherO.getNumWheels())))
			return true;
		return false;
	}
}