Thread: User Input help

I am trying to save up spare change and tips from my work to buy a nexus 7 and I thought I could make a program that tracks my balance and allows me to make deposits. Here is what I have. I need help making it where the user can input how much the deposit amount is.

import java.util.Scanner;
class newDeviceFund
{
	//instance variables
	double balance;
	double goal;
	double difference;
	double amount;
 
	//constructors
	newDeviceFund(double bal, double gol)
	{
		balance = bal;
		goal = gol;
		difference = gol - bal;
	}
	//methods
	double getBalance()
	{
		return balance;
	}
	void deposit(double amt)
	{
		amount = amt;
		Scanner scan = new Scanner(System.in);
		System.out.println("How much is your deposit? $");
		amount = scan.nextDouble();
		balance = balance + amount;
	}
	void allInfo()
	{
		System.out.println("Balance: $" + balance + "\nGoal: $" + goal + "\nYou have $" + difference + " to go!");
	}
}
class newDevice
{
	public static void main(String[] args)
	{
		String device;
		String numChoice;
		newDeviceFund grouper = new newDeviceFund(0, 199);
		newDeviceFund manta = new newDeviceFund(0, 399);
		grouper.deposit();
		/*System.out.println("Type device codename");
		Scanner choice = new Scanner(System.in);
		device = choice.nextLine();
		if (device.equals("grouper"))
			System.out.println("Press 1 to deposit \nPress 2 to view stats on account");
			Scanner num = new Scanner(System.in);
			numChoice = num.nextLine();
			if (numChoice.equals("1"))
				grouper.deposit();
			if (numChoice.equals("2"))
				grouper.allInfo();
		if (device.equals("manta"))
			System.out.println("Press 1 to deposit \nPress 2 to view stats on account");
			Scanner next = new Scanner(System.in);
			numChoice = num.nextLine();
			if (numChoice.equals("1"))
				manta.deposit();
			if (numChoice.equals("2"))
				manta.allInfo();
		*/
	}
}

When I call the method by adding grouper.deposit();

This error is thrown
javac newDevice.java
newDevice.java:43: deposit(double) in newDeviceFund cannot be applied to ()
grouper.deposit();
^
1 error

If I put any random number in the arguments for deposit() for example: deposit(2) is it going to automatically deposit what I set the argument or is it going to start to use the user input?

How would you suggest revising the code that does not make sense?
Thank you for your help!

okay, I got that problem fixed with your help. Can you help me create a GUI similar to one like the attached picture?
screenshot02.jpg
the GUI in the pic works by selecting the number associated with the task you want to do. It does it and then returns to the page with all the options.

that guide is not for a GUI like the picture.

oh, sorry. How do I make a console similar to that one?

No, I'll stick with the included one.

How could I make only the balance be sent to a file? I tried java newDevice > balance.txt but it sends "type device codename" to the file.

Sorry if I am getting on your nerves. I certainly am not trying to. Java program write to file please.

one last question. I need to make it where when I can go back to the point where I make the decision to view stats or deposit. How do I do this?

Got it! Now I just have to get it GUI'd up and I'll be all done!