import java.io.*;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import java.awt.Font;

public class IO
{
  //  private static BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

    public static void showMessage (String s)
    {    
      JTextArea area = new JTextArea(s);
      area.setFont(new Font(Font.MONOSPACED, Font.PLAIN, 12)); 
      JOptionPane.showMessageDialog (null, area);
    }
    
 
    public static void showValue (String s1, String s2)
    {    
      IO.showMessage (s1+s2);
    }
    
 
    public static double readDouble (String prompt)
    {
      try
      {   
         String s = JOptionPane.showInputDialog(prompt);
		   return Double.parseDouble(s);
      }
      catch (Exception e)  { return Double.NaN; }
    }
    
    public static float readFloat (String prompt)
    {   
      try
      {
        String s = JOptionPane.showInputDialog (prompt);
        return (Float.parseFloat(s));
      }
      catch (Exception e) { return Float.NaN; }
    }
    
    public static int readInt (String prompt)
    {   
      try
      {
        String s = JOptionPane.showInputDialog (prompt);
        return (Integer.parseInt(s));
      }
      catch(Exception e) { return Integer.MAX_VALUE; }
    }
    
    public static char readChar (String prompt)
    {   
		String s = JOptionPane.showInputDialog(prompt);
      if (s == null) { return 0; }
      else if (s.length () > 0)
			 return s.charAt (0);
		else return 0;
    }
 
    public static String readString (String prompt)
    {    return (JOptionPane.showInputDialog (prompt));
    }
}  // End of IO class