Ca program

[jimJohnson]

I was seeing if someone can take a look at my code for my program as I have two issues...

if I hit 2 or 3 to start the program it returns an error but also still stores the variable as you can see here...

Start the app
1: Start the car
2: Drive the car
3: Stop the car
-1: Ends the program
Enter a selection by typing 1, 2, or 3: 2
You are driving the car!
1: Start the car
2: Drive the car
3: Stop the car
-1: Ends the program
Enter a selection by typing 1, 2, or 3:

My other issue is even after I hit 1 to start the program it starts over so the only thing I can type is 1 to start the car
Start the app
1: Start the car
2: Drive the car
3: Stop the car
-1: Ends the program
Enter a selection by typing 1, 2, or 3: 2
You are driving the car!
1: Start the car
2: Drive the car
3: Stop the car
-1: Ends the program
Enter a selection by typing 1, 2, or 3:

Here is my code I believe the problem is in the following code and will put the rest of my code after...

		//if statments
		//if(nova == 1)
		//{
		myCar.start(nova);
		//}

		if(nova == 2)
		{
			myCar.drive(nova);
		}
		if(nova == 3)
		{
			myCar.stop(nova);
		}

Here is the rest of my code...

/*
Programmer: Bryan Kruep
Date: 9/11/2012
Assignment: ProgrammingAssignment3
*/

import java.util.Scanner;
public class MyApp
{
	public static void main(String [] args)
	{
		int nova;

		System.out.println("Start the app");



		Car myCar = new Car();

		do
		{

		Scanner keyboard = new Scanner(System.in);


		System.out.println("1: Start the car");
		System.out.println("2: Drive the car");
		System.out.println("3: Stop the car");
		System.out.println("-1: Ends the program");
		System.out.print("Enter a selection by typing 1, 2, or 3: ");
		nova = keyboard.nextInt();

		while((nova != 1) && (nova != 2) && (nova != 3) && (nova != -1))
		{
			System.out.println("This is not a valid selection!");
			System.out.print("Make a selection again: ");
			nova = keyboard.nextInt();
		}

		//if statments
		//if(nova == 1)
		//{
		myCar.start(nova);
		//}

		if(nova == 2)
		{
			myCar.drive(nova);
		}
		if(nova == 3)
		{
			myCar.stop(nova);
		}

		}while(nova != -1);

	}
}


//class car
class Car
{
	//public int watts = 100;
	private boolean isStarted = true;

	public void start(int nova)
	{
		Scanner keyboard = new Scanner(System.in);
		if(nova != 1) isStarted = false;
		while((nova != 1) && (nova != -1))
		{
			System.out.println("You must first start the car to drive or stop it!");
			System.out.print("Make a selection again: ");
			nova = keyboard.nextInt();
		}


		showState(nova);



	}
	public void drive(int nova)
	{
		/*Scanner keyboard = new Scanner(System.in);
		System.out.println("Please make your decision on what you want the car to do next!");
		System.out.println("1: Start the car");
		System.out.println("2: Drive the car");
		S/tem.out.println("3: Stop the car");
		System.out.print("What would you like the car to do next: ");
		nova = keyboard.nextInt();*/
		Scanner keyboard = new Scanner(System.in);
		while ((nova == 1) && (nova != 2) && (nova != 3) && (nova != -1))
		{
			System.out.println("This is not a valid selection!");
			System.out.print("Make a selection again: ");
			nova = keyboard.nextInt();
		}

		showState(nova);

	}
	public void stop(int nova)
	{
		/*Scanner keyboard = new Scanner(System.in);
		System.out.println("Please make your decision on what you want the car to do next!");
		System.out.println("1: Start the car");
		System.out.println("2: Drive the car");
		System.out.println("3: Stop the car");
		System.out.print("What would you like the car to do next: ");
		Scanner keyboard = new Scanner(System.in);
		nova = keyboard.nextInt();*/
		Scanner keyboard = new Scanner(System.in);
		while(nova == 1)
		{
			System.out.println("This is not a valid selection!");
			System.out.print("Make a selection again: ");
			nova = keyboard.nextInt();
		}

		showState(nova);


	}

	public String showState(int nova)
	{

		switch(nova)
		{
			case 1:
				System.out.println("You have started the car!");
				break;
			case 2:
				System.out.println("You are driving the car!");
				break;
			case 3:
				System.out.println("You have stopped the car!");
				break;
		}
		return "" + nova;
	}

}

[DarrylBurke]

if I hit 2 or 3 to start the program it returns an error

Whenever seeking help with an error, post the entire error text or stack trace.

db

[jimJohnson]

I apologize as I did not interpret it correctly. It does not make an error but it just doesn't return an error message when it should.

[DarrylBurke]

Clear as mud. Errors are thrown, not returned.

db

[jimJohnson]

I don't get error messages but here are my problems. When I start the program I am trying to set it up to where if I don't enter a 1 it will return an error and this part is correct. However, after I do hit the 1 it pretty much just loops my program and starts over again when I want it to test what the car would do next and it just starts over. The other thing it does When i hit like 2 to start the program and then hit 1 it stores both numbers which is not what I want it to do either. It is due tomorrow but if there is anything you can see please let me know.