SampleLang.java Source code

Introduction

Here is the source code for SampleLang.java

Source

import java.util.Calendar;
import java.util.Date;
import org.apache.commons.lang3.time.*;
import org.apache.commons.lang3.*;
import java.text.ParseException;

public class SampleLang {
    /**
     * Check if the key is valid
     * @param key license key value
     * @return true if key is valid, false otherwise.
     */
    public static boolean checkLicenseKey(String key) {
        //checks if empty or null
        if (StringUtils.isBlank(key)) {
            return false;
        }
        //delete all white space
        key = StringUtils.deleteWhitespace(key);
        //Split String using the - separator
        String[] keySplit = StringUtils.split(key, "-");
        //check lengths of whole and parts
        if (keySplit.length != 2 || keySplit[0].length() != 4 || keySplit[1].length() != 4) {
            return false;
        }
        //Check if first part is numeric
        if (!StringUtils.isNumeric(keySplit[0])) {
            return false;
        }
        //Check if second part contains only
        //the four characters 'J', 'A', 'V' and 'A'
        if (!StringUtils.containsOnly(keySplit[1], new char[] { 'J', 'A', 'V', 'A' })) {
            return false;
        }
        //Check if the fourth character
        //in the first part is a '0'
        if (StringUtils.indexOf(keySplit[0], '0') != 3) {
            return false;
        }
        //If all conditions are fulfilled, key is valid.
        return true;
    }

    public static void checkDate() throws InterruptedException, ParseException {
        //date1 created
        Date date1 = new Date();
        //Print the date and time at this instant
        System.out.println("The time right now is >>" + date1);
        //Thread sleep for 1000 ms
        Thread.currentThread().sleep(DateUtils.MILLIS_PER_MINUTE);
        //date2 created.
        Date date2 = new Date();
        //Check if date1 and date2 have the same day
        System.out.println("Is Same Day >> " + DateUtils.isSameDay(date1, date2));
        //Check if date1 and date2 have the same instance
        System.out.println("Is Same Instant >> " + DateUtils.isSameInstant(date1, date2));
        //Round the hour
        System.out.println("Date after rounding >>" + DateUtils.round(date1, Calendar.HOUR));
        //Truncate the hour
        System.out.println("Date after truncation >>" + DateUtils.truncate(date1, Calendar.HOUR));
        //Three dates in three different formats
        String[] dates = { "2005.03.24 11:03:26", "2005-03-24 11:03", "2005/03/24" };
        //Iterate over dates and parse strings to java.util.Date objects
        for (int i = 0; i < dates.length; i++) {
            Date parsedDate = DateUtils.parseDate(dates[i],
                    new String[] { "yyyy/MM/dd", "yyyy.MM.dd HH:mm:ss", "yyyy-MM-dd HH:mm" });
            System.out.println("Parsed Date is >>" + parsedDate);
        }
        //Display date in HH:mm:ss format
        System.out.println("Now >>" + DateFormatUtils.ISO_TIME_NO_T_FORMAT.format(System.currentTimeMillis()));
    }
}