import java.io.*;
import javax.swing.JOptionPane;

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

    public static void showMessage (String s)
    {    JOptionPane.showMessageDialog (null, s);
    }
    
    public static void showValue (String s, double d)
    {    JOptionPane.showMessageDialog (null, s+d);
    }
    
    public static void showValue (String s, float f)
    {    JOptionPane.showMessageDialog (null, s+f);
    }
    
    public static void showValue (String s, int i)
    {    JOptionPane.showMessageDialog (null, s+i);
    }
    
    public static void showValue (String s, char c)
    {    JOptionPane.showMessageDialog (null, s+c);
    }

    public static void showValue (String s1, String s2)
    {    IO.showMessage (s1+s2);
    }
    
    /*
    public static double readDouble (String prompt)
    {    String s;
        s = JOptionPane.showInputDialog (prompt);
        return (Double.parseDouble(s));     
    }
    */

	public static void resetStdIn()
	{
		in = new BufferedReader(new InputStreamReader(System.in));
	}

    public static double readDouble (String prompt)
    {   String s = JOptionPane.showInputDialog(prompt);
		return Double.parseDouble(s);
    }
    
    public static float readFloat (String prompt)
    {   String s = JOptionPane.showInputDialog (prompt);
        return (Float.parseFloat(s));
    }
    
    public static int readInt (String prompt)
    {   String s = JOptionPane.showInputDialog (prompt);
        return (Integer.parseInt(s));
    }
    
	/* UP: fix per readDouble */
    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 '\n';
    }
 
    public static String readString (String prompt)
    {    return (JOptionPane.showInputDialog (prompt));
    }
    
    public static String concatenate (String s1, String s2)
    {    return (s1 + s2);
    }
    
    public static String concatenate (String s1, double d)
    {    return (s1 + d);
    }
}