import java.awt.*;
import javax.swing.*;

public class square extends JApplet
{
    public static int inputNumber;
    public static char inputChar;

    // obtain value from user
    //where was your main method
    public static void main(String[] args)
    {
        sqSize();
        myChar();
    }
    
    public static void sqSize()
    {
        String inputString;
        boolean invString = true;
        
        do
        {
            inputString = JOptionPane.showInputDialog(null,
            "Enter square size:" );
            //before it parses the string into a int this for loop checks each individual alphanumeric character
            //in the string to make sure it isn't a letter, if it is it prompts the user to enter the data again.
            for(int i = 0; i < inputString.length();i++)
                {
                if(Character.isLetter(inputString.charAt(i)))
                    invString = true;
                else
                    invString = false;
                }
                if(invString == true)
                    JOptionPane.showMessageDialog(null,"That was not a number." +
                    "\nPlease try again.");
                
        }while(invString == true);

        inputNumber = Integer.parseInt( inputString );
        //test it worked
        JOptionPane.showMessageDialog(null, "The size you entered was: "
        + inputNumber);
    
    }
    
    public static void myChar()
    {
        String inputAChar;
        boolean invChar = true;
        do
        {
            inputAChar = JOptionPane.showInputDialog(null,
            "Enter Character:" );
            //same story except checks if it is a character
            for(int i = 0; i < inputAChar.length();i++)
                {
                if(!Character.isLetter(inputAChar.charAt(i)))
                    invChar = true;
                else
                    {
                    inputChar = inputAChar.charAt(i);//assigns the valid character at string index i to inputChar
                    invChar = false;
                    }
                }
                if(invChar == true)
                    JOptionPane.showMessageDialog(null,"That was not a character." +
                    "\nPlease try again.");
        }while(invChar == true);
        //test it worked
        JOptionPane.showMessageDialog(null, "The character you entered was: "
        + inputChar);
        
        //i wouldn't recommend changing your entered character into a int.......
    }


// draw square of
//where is the variable 'side' being initialized?? you are telling your for loop to multiple null by null
    public void squareOfCharacters( Graphics g, int side )
    {
        int y = 50, x = 5;

        for ( int count = 1; count <= side * side; count++ )
        {
            g.drawString( "*", x += 5, y );
            if ( count % side == 0 )
            {
                y += 10;
                x = 5;
            }

        } // end for loop

    } // end method squareOfCharacters

    // execute method squareOfCharacters
    public void paint( Graphics g )
    {
    squareOfCharacters( g, inputNumber );

    } // end method paint

} // end class Square