import javax.swing.*;
import uwcse.graphics.*;
import java.io.*;
import java.text.*;

/**
 * Different options of standard I/O in java
 * 
 */
public class InputOutput
{
    /**
     * Examples of I/O
     */
    public void doSomeIO()
    {
        // Input and output of an integer or a double
        int i;
        double x;
        String s;

        // use an Input object
        Input input = new Input();
        i = input.readInt("Enter an integer (will recover if bad input)");
        System.out.println("i="+i);
        
        // use a JOptionPane method        
        s = JOptionPane.showInputDialog(null,"Enter an integer (crashes if bad input)",
        "Integer input",JOptionPane.QUESTION_MESSAGE);
        i = Integer.parseInt(s);
        JOptionPane.showMessageDialog(null,"i="+i,"Value of i",
        JOptionPane.INFORMATION_MESSAGE);

        // The complicated way (you don't need to understand this part)
        BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
        try{    
            System.out.print("Enter a double (crashes if bad input):");
            s = r.readLine();
        }
        catch(IOException ioe){/* ignore any the exception */}
        x = Double.parseDouble(s);
        DecimalFormat d = new DecimalFormat("0.000");
        System.out.println("x="+d.format(x));

        // Use a GWindow method
        GWindow window = new GWindow("Doing some I/O");
        x=window.readDouble("Enter a dollar amount (recover if bad input)");
        NumberFormat c = NumberFormat.getCurrencyInstance();
        window.add(new TextShape("amount="+c.format(x),50,50));
    }
}