Happy New Year!

Hello World!

It's a brand new year, and that entails new beginnings once again.

Here's a bit of review of some codes I've done in the past year.

Happy New Year and Welcome to 2011! ^.^

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import java.util.Scanner;
import java.text.NumberFormat;
public class QC_Price {

    /**
     * This program is intended to approximate the total cost of items purchased after taxes.
     * @author A. Wright
     * @version 1.0, March 2010
     */
    public static void main(String[] args) {
        Scanner kb = new Scanner(System.in);
        double PST=0.07875, GST=0.05;
        double subtotal=0,total;
        int op1, items;
        double[] prices;
        NumberFormat currencyFormatter;
       
        System.out.println("Would you like to:"
                        +"\n1.Calculate sub-total AND total costs?"
                        +"\n2.Calculate ONLY total cost?");
        op1=kb.nextInt();
        while(op1<1||op1>2){
            System.out.println("That is not a valid option.\nPlease enter a valid option:");
            System.out.println("Would you like to:"
                    +"\n1.Calculate sub-total AND total costs?"
                    +"\n2.Calculate ONLY total cost?");
            op1=kb.nextInt();
        }
        if(op1==1){
            System.out.println("Please enter number of items to be inputed:");
            items=kb.nextInt();
            while(items<0){
                System.out.println("That is not a valid number.\nPlease enter a positive value:");
                System.out.println("Please enter number of items to be inputed:");
                items=kb.nextInt();
            }
            if(items==0){
                System.out.println("No item quantity was specified.\nSystem aborting operation.");
                System.exit(0);
            }
            prices=new double[items];
            System.out.println("Please enter item prices as advertized:");
            for(int i=0;i<items;i++){
                System.out.print((i+1)+". ");
                prices[i]=kb.nextDouble();
                subtotal += prices[i];
            }
            String currencySubtotal,currencyGST,currencyPST,currencyTotal;
            currencyFormatter=NumberFormat.getCurrencyInstance();
            currencySubtotal=currencyFormatter.format(subtotal);
            currencyGST=currencyFormatter.format(((subtotal*GST)));
            currencyPST=currencyFormatter.format(((subtotal*PST)));
            System.out.println("The subtotal amount is: "+currencySubtotal+" CDN.");
            total=subtotal+(subtotal*(GST+PST));
            currencyTotal=currencyFormatter.format(total);
            System.out.println("The total GST amount is: "+currencyGST+" CDN.");
            System.out.println("The total PST amount is: "+currencyPST+" CDN.");
            System.out.println("The total amount is: "+currencyTotal+" CDN.");
            System.exit(0);
        }
       
        if(op1==2){
        System.out.println("Please enter sub-total costs:");
        subtotal=kb.nextDouble();
        while(subtotal<0){
            System.out.println("That is not a valid price.\nPlease enter a positive value:");
            System.out.println("Please enter sub-total costs:");
            subtotal=kb.nextDouble();
        }
        total=subtotal+(subtotal*(GST+PST));
        String currencysubtotal,currencygst,currencypst,currencytotal;
        currencyFormatter=NumberFormat.getCurrencyInstance();
        currencysubtotal=currencyFormatter.format(subtotal);
        currencygst=currencyFormatter.format(((subtotal*GST)));
        currencypst=currencyFormatter.format(((subtotal*PST)));
        currencytotal=currencyFormatter.format(total);
        System.out.println("The subtotal amount is: "+currencysubtotal+" CDN.");
        System.out.println("The total GST amount is: "+currencygst+" CDN.");
        System.out.println("The total PST amount is: "+currencypst+" CDN.");
        System.out.println("The total amount is: "+currencytotal+" CDN.");
        System.exit(0);
        }
    }
}

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/*
 * Author: A. Wright
 * Date Written: November 12, 2010
 * Purpose: To properly print out a visual of a month according to the Gregorian Calendar.
 * Assignment: 3C
 * Class: Programming 1
 * Institution: CÉGEP Vanier College
 */

import java.util.Scanner;

public class MonthCalendar {

    static Scanner kb = new Scanner(System.in); //Scanner object   
    static int yearInput, monthInput;
   
    public static int readInt()
    {
        int inputInteger;
        while(! kb.hasNextInt())
        {
            String lineInput = kb.nextLine();
            System.out.println(lineInput+" is not a valid input. Try again...");           
            System.out.println("Please enter an integer value: ");           
        }
        inputInteger = kb.nextInt();
        return inputInteger;
    }
   
    public static int readMonth()
    {
        System.out.println("Enter a month's integer value between [1-12]: ");
        monthInput = readInt();
        while(monthInput < 1 || monthInput > 12)
        {
            System.out.println(monthInput+" is not a valid integer value, try again...");
            System.out.println("Enter a month's integer value between [1-12]: ");
            monthInput = readInt();
        }
        return monthInput;
    }
       
    public static int readYear()
    {
        System.out.println("Enter a year value greater than or equal to 1582: ");
        yearInput = readInt();
        while(yearInput < 1582)
        {
            System.out.println("That is not a valid year value, try again...");
            System.out.println("Enter a year value greater than or equal to 1582: ");
            yearInput = readInt();
        }
        return yearInput;
    }
   
    public static String getMonthName(int monthValue)
    {
        String nameOfMonth = null;
       
        switch(monthValue)
        {
        case 1:
            nameOfMonth = "January";
            break;
        case 2:
            nameOfMonth = "February";
            break;
        case 3:
            nameOfMonth = "March";
            break;
        case 4:
            nameOfMonth = "April";
            break;
        case 5:
            nameOfMonth = "May";
            break;
        case 6:
            nameOfMonth = "June";
            break;
        case 7:
            nameOfMonth = "July";
            break;
        case 8:
            nameOfMonth = "August";
            break;
        case 9:
            nameOfMonth = "September";
            break;
        case 10:
            nameOfMonth = "October";
            break;
        case 11:
            nameOfMonth = "November";
            break;
        case 12:
            nameOfMonth = "December";
            break;
        }
        return nameOfMonth;
    }
   
    public static boolean isLeapYear(int year)
    {
        boolean isLeapYear = (year % 4 == 0) && (year % 100 != 0) || (year % 400 == 0);
        return isLeapYear;
    }
   
    public static int getDaysInMonth (int month,int year)
     {
        int daysInMonth = 0;

        switch (month)
          {
             case 1: case 3: case 5: case 7: case 8: case 10: case 12: daysInMonth = 31; break;
             case 2:
                 if(isLeapYear(year))
                 {
                     daysInMonth = 29;
                 }
                 else
                     daysInMonth = 28;
                 break;
             default : daysInMonth = 30; break;

          }
           return daysInMonth;
      }
   
    public static int zeller(int month, int day, int year)
    {
       
        int d = day;
        int m = 0;
       
        switch(month)
        {
        case 1:
            m = 11;
            break;
        case 2:
            m = 12;
            break;
        case 3:
            m = 1;
            break;
        case 4:
            m = 2;
            break;
        case 5:
            m = 3;
            break;
        case 6:
            m = 4;
            break;
        case 7:
            m = 5;
            break;
        case 8:
            m = 6;
            break;
        case 9:
            m = 7;
            break;
        case 10:
            m = 8;
            break;
        case 11:
            m = 9;
            break;
        case 12:
            m = 10;
            break;
        }
        if(m == 11 || m == 12)
        {
            year -= 1;
        }
        int c = year / 100; //First 2 digits of the year
        int y = year % 100; //Last 2 digits of the year
        int z = (d + ((13 * m - 1) / 5) + y + (y / 4) + (c / 4) - (2 * c)) % 7; //Zeller's Formula
        if(z < 0)
        {
            z += 7;
        }
        return z;
    }
       
    public static void printSpace(int position)
    {
        for(int k = 0; k <= position - 1; k++)
        {
            System.out.print("     ");
        }
    }
   
    public static void printMonthAndYearCentered(String monthName, int year)
    {
        String calendarMonthYear = monthName+", "+year;
        int startingSpaces = (33/2)-(calendarMonthYear.length()/2);
        for(int k = 0; k < startingSpaces; k++)
        {
            System.out.print(" ");
        }
        System.out.println(calendarMonthYear);
    }
   
    public static void printGregorianCalendar(int month, int year)
    {
        int daysInMonth = getDaysInMonth(month, year);
        int day = 1;
        int firstDay = zeller(month, 1, year);
   
        String monthName = getMonthName(month);
   
        System.out.println();
        System.out.print("  ");
        printMonthAndYearCentered(monthName, year);
        System.out.println("\n  ---------------------------------");
        System.out.println("  Sun  Mon  Tue  Wed  Thu  Fri  Sat");
        System.out.println("  ---  ---  ---  ---  ---  ---  ---");
        printSpace(firstDay);   
        for(int w = 0 ;w <= 6 - firstDay; w++)
        {
          System.out.print("    "+ day++);
        }
        System.out.println();
        for(int y = 0; y <= 6 ; y++)
        {
           for(int x = 0; x < 7; x++)
           {
              if(day / 10 ==0)
              {
                System.out.print("    " + day++);
              }
              else
              {
                System.out.print("   " + day++);
              }
   
              if(day > daysInMonth ) break;
           }
           if(day > daysInMonth ) break;
           System.out.println();
       }
       System.out.println("\n  ---------------------------------");
    }
       
    public static void main(String[] args)
    {
        int month = readMonth();
        System.out.println("Input confirmed as valid. Continue...");
        int year = readYear();
        System.out.println("Input confirmed as valid. Retrieving Calendar archive...");
        printGregorianCalendar(month, year);       
    }   
}

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