Lessons6Example1Lavel2

package com.gmail.kudr641;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Scanner;

public class Lessons6Example1Lavel2 {

	public static void main(String[] args) {
		Date nowDate = new Date();
		Date yourDate = new Date();
		
		SimpleDateFormat sdf = new SimpleDateFormat("dd MM yyyy");
								
		SimpleDateFormat sdfNew = getNewFormater(getNowCalendar(nowDate, sdf), getYourCalendar(yourDate, sdf));
				
		String result = sdfNew.format(yourDate);
		
		System.out.println("Result date: " + result);
	}
	
	static Calendar getNowCalendar(Date nowDate, SimpleDateFormat sdf){

		String dateText = sdf.format(nowDate);
		
		System.out.println("Now: " + dateText);
				
		Calendar calendarNow = Calendar.getInstance();
		
		calendarNow.setTime(nowDate);
		
		return calendarNow;
	}
	
	static Calendar getYourCalendar(Date yourDate, SimpleDateFormat sdf){
		
		System.out.println("Input date (format dd MM yyyy)");
		
		Scanner scanner = new Scanner(System.in);
				
		String yourDateText = scanner.nextLine();
		
		scanner.close();
		
		try{
			yourDate = sdf.parse(yourDateText);			
		} catch(ParseException e){
			System.out.println(e);
		}
		
		yourDateText = sdf.format(yourDate);
		
		System.out.println("Your date: " + yourDateText);
		Calendar calendarYour = Calendar.getInstance();
		
		calendarYour.setTime(yourDate);
		return calendarYour;
	}
	
	static SimpleDateFormat getNewFormater(Calendar calendarNow, Calendar calendarYour){		
		StringBuilder sb = new StringBuilder("");
		
		if(calendarNow.get(Calendar.DAY_OF_MONTH) == calendarYour.get(Calendar.DAY_OF_MONTH)){			
			sb.append("dd ");
		}
		if(calendarNow.get(Calendar.MONTH) == calendarYour.get(Calendar.MONTH)){
			sb.append("MM ");
		}
		if(calendarNow.get(Calendar.YEAR) == calendarYour.get(Calendar.YEAR)){
			sb.append("yyyy");
		}
		
		SimpleDateFormat sdfNew  = new SimpleDateFormat(sb.toString());
		return sdfNew;
	}

}

Lessons6Example2Lavel2

package com.gmail.kudr641;

import java.util.Scanner;

public class Lessons6Example2Lavel2a {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);

		System.out.print("Input first number: ");
		int one = scanner.nextInt();
		String oneString = Integer.toBinaryString(one);
		System.out.println("The first in a binary system: " + oneString);
		
		System.out.print("Input second number: ");
		int two = scanner.nextInt();
		String twoString = Integer.toBinaryString(two);
		System.out.println("The second in a binary system: " + twoString);
		
		scanner.close();
						
		printResult(one, two);
	}
	
	static void printResult(int one, int two){
		int xor = one ^ two;
		String xorString = Integer.toBinaryString(xor);
		int distanceHamming = 0;
		for(int i = 0; i < xorString.length(); i += 1){
			if(xorString.charAt(i) == '1'){
				distanceHamming += 1;
			}
		}
		System.out.println("Hamming distance: " + distanceHamming);
	}
	
}	

Lessons6Example3Lavel2

package com.gmail.kudr641;

import java.util.Scanner;

public class Lessons6Example3Lavel2 {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);

		System.out.println("Input number:");
		int number = scanner.nextInt();

		scanner.close();

		String numberString = Integer.toString(number);

		for (int i = 1; i < numberString.length() / 2; i += 1) {
			if (numberString.length() % i == 0) {
				boolean yes = true;
				for (int j = 0; j < numberString.length() - i; j += i) {
					if (numberString.charAt(j) != numberString.charAt(j + i)) {
						yes = false;
						break;
					}
				}
				if (yes) {
					for (int k = 0; k < i; k += 1) {
						System.out.print(numberString.charAt(k));
					}
					break;
				}
			}
		}
	}
}