// Our version of Keyboard.java
// DrJava-friendly: uses Dialog Boxes (also solves focus problem)

// Place Keyboard.class in same directory as your programs,
// and DO NOT "import cs1" (or else you'll get LLC's Keyboard class)

// Use:
// Keyboard.readInt()    or  Keyboard.readInt(prompt)
// Keyboard.readDouble() or  Keyboard.readDouble(prompt)
// Keyboard.readString() or  Keyboard.readString(prompt)

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

public class Keyboard {
  public static String readString() { return readString("Enter a string"); }
  
  public static String readString(String prompt) {
    System.out.print(prompt + " --> ");
    String result = JOptionPane.showInputDialog(null,prompt);
    System.out.println("[ " + result + " ]");
    return result;
  }

  public static int readInt() { return readInt("Enter an integer"); }
  
  public static int readInt(String prompt) {
    while (true) {
      try { return Integer.parseInt(readString(prompt).trim()); }
      catch (Exception e) { oops(); }
    }
  }

  public static double readDouble() { return readDouble("Enter a floating-point number"); }
  
  public static double readDouble(String prompt) {
    while (true) {
      try { return Double.parseDouble(readString(prompt).trim()); }
      catch (Exception e) { oops(); }
    }
  }

  private static void oops() {
    Toolkit.getDefaultToolkit().beep();
    String errMessage = "** There was an error in your input.  Please try again. **";
    System.out.println(errMessage);
    JOptionPane.showMessageDialog(null,errMessage);
  }
  
  public static void test() {
    int i = Keyboard.readInt("Please enter an integer");
    System.out.println("You entered: " + i);
    double d = Keyboard.readDouble("Now enter a double");
    System.out.println("You entered: " + d);
    String s = Keyboard.readString("And enter a String");
    System.out.println("You entered: " + s);
  }
  
  public static void main(String[] args) { Keyboard.test(); }
}