Exceptions?

[linc186]

I'm writing a small craps game in java. I need help writing exceptions int his code.

package craps;
import java.util.Scanner;
import java.util.Random;
class Craps {

	public static void main(String[] args) {
		
		//welcome message. Prompts the user to:
		System.out.println("Welcome!");
		System.out.println("Choose your difficulty:");
		System.out.println("Press 1 for easy (500 dollars)");
		System.out.println("Press 2 for intermediate (300 dollars)");
		System.out.println("Press 3 for expert (100 dollars)");
		
		
		int difficultyc = difficulty_checker();
		//prints the amount of money user has once difficulty has been selected
		System.out.println("money = " + difficultyc);
		
		System.out.println("Bet some money!");
		int bet = bet_checker(difficultyc);
		//prints the amount of money user has after user has bet some
		System.out.println("You now have: " + bet + " dollars.");
		
		int craps = game_craps(bet, difficultyc);
		//prints the amount of money the user has after winning/losing
		System.out.println("You now have: " + craps + " dollars.");
		}
	
	/**
	 * Determines what difficulty user will use
	 */
	public static int difficulty_checker(){
		Scanner myScanner = new Scanner(System.in);
		int difficulty = myScanner.nextInt();
		int money = 0;
		switch(difficulty){
		case 1:
			money = 500;
			break;
		case 2:
			money = 300;
			break;
		case 3:
			money = 100;
			break;	
		case 4:
			money = 1000;
			System.out.println("Aha! secret difficulty: moron.");
			break;
                // i need an exception here if the user doesn't input a number between 1 - 4
		}
		return money;
	}
	/** 
	 * Determines how much money user will bet
	 */
	public static int bet_checker(int money){
		Scanner myScanner = new Scanner(System.in);
		int better = myScanner.nextInt();
		money -= better;
		return money;
            //need an exception here if user bets more money than user has
	}
	/**
	 * Executing the game craps
	 */
	public static int game_craps(int money, int better){
		Random myRandom = new Random();
		Scanner myScanner = new Scanner(System.in);
		System.out.println("Press 1 to play!");

		int play = myScanner.nextInt();
		if(play == 1){
		//need an exception here if user doesn't press 1
		int die1 = myRandom.nextInt(6) + 1;
		int die2 = myRandom.nextInt(6) + 1;
		
		System.out.print("die1: " + die1 + "  ");
		System.out.println("die2: " + die2);
		
		if(die1 + die2 == 4 | die1 + die2 == 7){
			better *= 2;
			money += better;
			System.out.println("You won!");
		} else {
			System.out.println("You lose!");
		}
		} else {
			System.out.println("What?");
		}
		
		
		return money;
	}

}

Edit:
Also! I need help with writing a line of code: after the program executes craps, it just stops. I want the user to be able to bet again. How would I do that?
edit again...:
i also need an exception in case the user inputs a decimal number, as obviously all the numbers are ints.

[linc186]

*bump* help, please?

[revathi17]

For the switch case,
you can use the 'default' case. In case user does not enter between 1-4, it will automatically go to default wherein you can throw an exception and catch it in your main.
For all the other places where you require a exception, you can call throws new Exception() and then catch it in your main program and print the appropriate message.
Hope this helps!

Thanks,

[Eranga]

Edit:
Also! I need help with writing a line of code: after the program executes craps, it just stops. I want the user to be able to bet again. How would I do that?
edit again...:
i also need an exception in case the user inputs a decimal number, as obviously all the numbers are ints.

So what you've tried so far?