Help me solve the "ANSWER" problem

[apollo abel]

Hello, im new here, and im a new java student.
i've written a program. however, the program asks the user a question, the user needs to answer either 1 or 2. i need the program to ask the question as long as the user doesnt enter 1 or 2. so if the user enters "2365" or "addasda" it will ask the question again.
this is the main class:

import java.util.Random;
public class Game
{
private String name;
private String answer;
private int numMarbles;
private int marblesTaken;
private int pcMarblesTaken;
int exit;
int exit2;

public Game(String name)
{
this.name = name;



}

public String getName()
{
return name;
}





public boolean goodInput()
{
//do
//{

//if(exit==1)

//return true;

if(exit2 == 1 || exit2==2)

return true;

return false;
//}
//while(!goodInput());
}

 
}

This is the test class:

import java.util.Random;
import java.util.Scanner;
public class GameTester
{
public static void main (String [] args)
{

Scanner input = new Scanner(System.in);
int exit;

do
{


System.out.print("what is your name: ");
String name = input.next();

Game howdy = new Game(name);
int exit2;
do
{


System.out.println("Hello " + howdy.getName() + " Do you want to go first? (1)Yes, (2)No");
exit2 = input.nextInt();


}
while(howdy.goodInput());
System.out.println("You must enter either 1 for Yes or 2 for No");

if(exit2==1)
{

Random random = new Random();
int min = 10;
int max = 100;
int diff = max - min + 1;
int numMarbles = random.nextInt(diff) + min;

System.out.println("the number of marbles is: " + numMarbles);


while(numMarbles > 1)
{
System.out.print("How many marbles you want to remove? ");
int marblesTaken = input.nextInt();

numMarbles = numMarbles - marblesTaken;

System.out.println("the number of marbles left is " + numMarbles);

System.out.println("It is now the computer's turn");

int pcMarblesTaken = random.nextInt(numMarbles/2)+1;

System.out.println("the computer has taken " + pcMarblesTaken + " marbles");

numMarbles = numMarbles - pcMarblesTaken;

System.out.println("the number of marbles left is: " + numMarbles);


if (numMarbles==1)
{
System.out.println(howdy.getName()+ " You lose");
break;
}
 
System.out.println("It is now your turn");

}


}
else
{
Random random = new Random();
int min = 10;
int max = 100;
int diff = max - min + 1;
int numMarbles = random.nextInt(diff) + min;

System.out.println("the number of marbles is: " + numMarbles);

while(numMarbles > 1)
{
int pcMarblesTaken = random.nextInt(numMarbles/2)+1;

System.out.println("the computer has taken " + pcMarblesTaken + " marbles");

numMarbles = numMarbles - pcMarblesTaken;

System.out.println("the number of marbles left is: " + numMarbles);

System.out.println("It is now your turn");

System.out.print("How many marbles you want to remove? ");
int marblesTaken = input.nextInt();

numMarbles = numMarbles - marblesTaken;

System.out.println("the number of marbles left is " + numMarbles);


if (numMarbles==1)
{
System.out.println(howdy.getName()+" You Win!!");
break;
}

System.out.println("It is now the computer's turn");

}

}


System.out.print("Do you want to play again? (1)Yes, (2)No ");
exit = input.nextInt();
}
while(exit==1);
System.out.println("Thanks for playing with us!");

}

}

[marc weber]

Originally posted by apollo abel:
...i need the program to ask the question as long as the user doesnt enter 1 or 2. so if the user enters "2365" or "addasda" it will ask the question again...

Welcome to JavaRanch!

The key is the last line (commented out) in your first piece of code...

//while(!goodInput());

You just need to fill in what you want to do while the user keeps entering bad input...

while( !goodInput() ) {
    //your code here
}

[ March 31, 2006: Message edited by: marc weber ]

[apollo abel]

hmmm i'd like to try it. however, i found a way around it.
here is the code:

import java.util.Random;
import java.util.Scanner;
public class GameTester
{
public static void main (String [] args)
{

Scanner input = new Scanner(System.in);
String exit = "1";

do
{


System.out.print("what is your name: ");
String name = input.next();

Game howdy = new Game(name);
String aString = "1";
do
{


System.out.println("Hello " + howdy.getName() + " Do you want to go first? (1)Yes, (2)No");
aString = input.next();


}
while(!aString.equals("1") && !aString.equals("2"));



if(aString.equalsIgnoreCase("1"))
{

Random random = new Random();
int min = 10;
int max = 100;
int diff = max - min + 1;
int numMarbles = random.nextInt(diff) + min;

System.out.println("the number of marbles is: " + numMarbles);


while(numMarbles > 1)
{
System.out.print("How many marbles you want to remove? ");
int marblesTaken = input.nextInt();

numMarbles = numMarbles - marblesTaken;

System.out.println("the number of marbles left is " + numMarbles);

System.out.println("It is now the computer's turn");

int pcMarblesTaken = random.nextInt(numMarbles/2)+1;

System.out.println("the computer has taken " + pcMarblesTaken + " marbles");

numMarbles = numMarbles - pcMarblesTaken;

System.out.println("the number of marbles left is: " + numMarbles);


if (numMarbles==1)
{
System.out.println(howdy.getName()+ " You lose");
break;
}
 
System.out.println("It is now your turn");

}


}
else
{
Random random = new Random();
int min = 10;
int max = 100;
int diff = max - min + 1;
int numMarbles = random.nextInt(diff) + min;

System.out.println("the number of marbles is: " + numMarbles);

while(numMarbles > 1)
{
int pcMarblesTaken = random.nextInt(numMarbles/2)+1;

System.out.println("the computer has taken " + pcMarblesTaken + " marbles");

numMarbles = numMarbles - pcMarblesTaken;

System.out.println("the number of marbles left is: " + numMarbles);

System.out.println("It is now your turn");

System.out.print("How many marbles you want to remove? ");
int marblesTaken = input.nextInt();

numMarbles = numMarbles - marblesTaken;

System.out.println("the number of marbles left is " + numMarbles);


if (numMarbles==1)
{
System.out.println(howdy.getName()+" You Win!!");
break;
}

System.out.println("It is now the computer's turn");

}

}

do
{

System.out.print("Do you want to play again? (1)Yes, (2)No ");
exit = input.next();
}
while(!exit.equals("1") && !exit.equals("2"));
if(exit.equals("2"))
{
System.out.println("Thanks for playing with us!");
break;
}
}
while(exit.equals("1"));


}

}

[marc weber]

Originally posted by apollo abel:
hmmm i'd like to try it...

Hmmm... I think you should try it -- at least to demonstrate to yourself how it works.