guess = Double.parseDouble(yguess);

if window input == number && !> 10
 
	do this
	get a random number and give the user three trys to guess it.
	after three guesses display a sorry message with the number
else
 
you have entered an invalid number
 
 
 
if window input == A-J && !> J
 
	do this
	get random number and give the user three tries to guess it.
	after three guesses display a sorry message with the letter.
 
else
 
you have entered an invalid character.

import java.lang*
import java.util.*;
import javax.swing.JOptionPane;

Declare your variables
Tell user to enter A for random letter or 1 for for random number.
if input = A then
{
	while (attempts < 3 && !done)
	{
	rndGuess = Letter(rndNum (0-9))
	ask user to pick a letter between A-J
	if user input.isUpperCase() then
		if rndGuess.CompareTo(userInputStr) < 0 then
			guessed to low
		else 
		{
			if rndGuess.CompareTo(userInputStr) > 0 then
				guessed too high
			Else
				guessed too correctly
				done = true
		}
		attempts = attempts + 1
	else
		tell user to input only uppercase letters
	if attempts > 3 then
		tell user the correct number
	} // end while
}
else
{
	if input.isNumeric() then
		userInputInt = Integer.parseInt(input)
		if userInputInt == 1 then
		while (attempts < 3 && !done)
		{
			generate rndNum(1-10)
			ask user to pick a number between 1-10
			if user input.isNumeric()
				userInputInt = Integer.parseInt(userInputInt)
				if userInputInt < rndGuess then
					guessed too low.
				else
				{
					if userInputInt > rndGuess then
						guessed to high
					else
						guessed correctly
						done = true
				}
			
				attempts = attempts + 1
			Else
				tell user to enter only numbers.
			if attempts > 3 then
				tell user the correct letter.
		} // end while
	else
		tell user to enter to either A (letters) or 1 (numbers) only
}