/*
 * JavaTemplate.java
 * Created by Richard Johnson
 * 9/28/04
 * Provides code for use in a variety of Java programs
 */

import javax.swing.*; // for GUIs
import java.util.*; // for tokenizing
import java.text.*; // for formatting
import java.io.*; // for input/output

public class JavaTemplate
{
   public static void main (String[] args) throws IOException, FileNotFoundException
   {
        // ==============================================
        //                   Preparation
        // ==============================================

        // declare all variables, objects, etc., for future use in the program
        String inputMessage1, outputMessage1, endOfProgramMessage, guiTitle1;
        String userInput1 = ""; // initialize variable for use w/ tokenizer
        double aDouble, newDouble; // some doubles
        String formattedDouble;
        String firstToken, secondToken;
		String fileInputString, fileOutputString;

		// create an object to get input from the keyboard
		BufferedReader keyboard = new BufferedReader(new InputStreamReader(System.in));

		// declare tokenizer objects for breaking up strings into tokens
		StringTokenizer tokenizer1, tokenizer2;

        // create decimal formatting object
		DecimalFormat twoDecimal = new DecimalFormat("0.00");

		// prepare for getting input from a file
		BufferedReader inFile = new BufferedReader(new FileReader("prog.out"));


        // ==============================================
        //                   Input
        // ==============================================

        inputMessage1 = "As an example, enter your first name and last name.\n\n";

        System.out.println(inputMessage1); // display input message to the console

        userInput1 = keyboard.readLine(); // get input from user w/ the keyboard
		System.out.println("This is what was just entered by the user: " + userInput1);

		// display input message and get input w/ simple GUI
        userInput1 = JOptionPane.showInputDialog(inputMessage1);
		System.out.println("This is what was just entered by the user: " + userInput1);

		// get input from a file
        fileInputString = inFile.readLine();
		System.out.println("This is what was read from the file: " + fileInputString);

        // ==============================================
        //                   Processing
        // ==============================================

		// create a tokenizer object for breaking up a string into tokens
        tokenizer1 = new StringTokenizer(userInput1);

		// tokenizing a string
		firstToken = tokenizer1.nextToken(); // get first token in string, store
		secondToken = tokenizer1.nextToken(); // get next token in string, store

		// a sample calculation
        aDouble = 15.7892; // just a sample double
		newDouble = 2 * aDouble;


        // ==============================================
        //                   Output
        // ==============================================

        // display output message w/ simple GUI
        outputMessage1 = "This is a message to the user for output.\n\n";
		guiTitle1 = "GUI Title 1";
        JOptionPane.showMessageDialog(null,outputMessage1,guiTitle1,JOptionPane.PLAIN_MESSAGE);

		// decimal formatting
		formattedDouble = twoDecimal.format(newDouble);

		// file output
		fileOutputString = "This is a string and the double: " + formattedDouble;
		PrintWriter outFile = new PrintWriter(new FileWriter("prog.out"));
		outFile.println(fileOutputString);
		outFile.close(); // close the file

        endOfProgramMessage = "End of Program";
		System.out.println(endOfProgramMessage);

		System.exit(0); // terminate GUI thread
   }
}