StringSwitchDemo.java

package jdk7;

/**
 * User: muthu
 * Date: 3/27/12
 * Time: 5:33 PM
 */
public class StringSwitchDemo {

    public static int getMonthNumber(String month) {

        int monthNumber = 0;

        if (month == null) {
            return monthNumber;
        }

        switch (month.toLowerCase()) {
            case "january":
                monthNumber = 1;
                break;
            case "february":
                monthNumber = 2;
                break;
            case "march":
                monthNumber = 3;
                break;
            case "april":
                monthNumber = 4;
                break;
            case "may":
                monthNumber = 5;
                break;
            case "june":
                monthNumber = 6;
                break;
            case "july":
                monthNumber = 7;
                break;
            case "august":
                monthNumber = 8;
                break;
            case "september":
                monthNumber = 9;
                break;
            case "october":
                monthNumber = 10;
                break;
            case "november":
                monthNumber = 11;
                break;
            case "december":
                monthNumber = 12;
                break;
            default:
                monthNumber = 0;
                break;
        }

        return monthNumber;

    }

    public static void main(String[] args) {

        String month = "August";

        int returnedMonthNumber =
                StringSwitchDemo.getMonthNumber(month);

        if (returnedMonthNumber == 0) {
            System.out.println("Invalid month");
        } else {
            System.out.println(returnedMonthNumber);
        }
    }
}

class SwitchDemo {
    public static void main(String[] args) {

        int month = 8;
        String monthString;
        switch (month) {
            case 1:
                monthString = "January";
                break;
            case 2:
                monthString = "February";
                break;
            case 3:
                monthString = "March";
                break;
            case 4:
                monthString = "April";
                break;
            case 5:
                monthString = "May";
                break;
            case 6:
                monthString = "June";
                break;
            case 7:
                monthString = "July";
                break;
            case 8:
                monthString = "August";
                break;
            case 9:
                monthString = "September";
                break;
            case 10:
                monthString = "October";
                break;
            case 11:
                monthString = "November";
                break;
            case 12:
                monthString = "December";
                break;
            default:
                monthString = "Invalid month";
                break;
        }
        System.out.println(monthString);
    }

    public void switchDemo() {
        java.util.ArrayList<String> futureMonths =
                new java.util.ArrayList<String>();

        int month = 8;

        switch (month) {
            case 1:
                futureMonths.add("January");
            case 2:
                futureMonths.add("February");
            case 3:
                futureMonths.add("March");
            case 4:
                futureMonths.add("April");
            case 5:
                futureMonths.add("May");
            case 6:
                futureMonths.add("June");
            case 7:
                futureMonths.add("July");
            case 8:
                futureMonths.add("August");
            case 9:
                futureMonths.add("September");
            case 10:
                futureMonths.add("October");
            case 11:
                futureMonths.add("November");
            case 12:
                futureMonths.add("December");
                break;
            default:
                break;
        }

        if (futureMonths.isEmpty()) {
            System.out.println("Invalid month number");
        } else {
            for (String monthName : futureMonths) {
                System.out.println(monthName);
            }
        }
    }
}