15-2_Move2.java

package lesson15;

/* Äàíà ìàòðèöà ïîðÿäêà MxN (M ñòðîê, N ñòîëáöîâ). Íåîáõîäèìî çàïîëíèòü åå çíà÷åíèÿìè è íàïèñàòü ôóíêöèþ,
 *  îñóùåñòâëÿþùóþ öèêëè÷åñêèé ñäâèã ñòðîê è/èëè ñòîëáöîâ ìàññèâà óêàçàííîå êîëè÷åñòâî ðàç 
 *  è â óêàçàííóþ ñòîðîíó.
*/
// íàïîëíåíèå ìàòðèöû - ðåàëèçóåì ÷åðåç ìåòîä
// âûâîä ìàòðèöû - ðåàëèçóåì ÷åðåç ìåòîä


import java.util.ArrayList;
import java.util.InputMismatchException;
import java.util.Random;

import java.util.Scanner;

public class Move2 {

	// ðàçìåðíîñòü ìàòðèöû
	private static int m, n;
	
	private static int direction;
	
	// êîë-âî ñäâèãîâ
	private static int quantity;
	
	private static boolean correctDirection, correctQuantity;
	
	// ñîçäàåì ñòðîêó-àëôàâèò (íàáîð ñèìâîëîâ)
	private static String alphabet = "abcdefghijklmnopqrstuvwxyz";
	
	// äëèíà ñòðîêè íóæíà äëÿ ãðàíèöû ðåíäîìíîãî âûáîðà ñèìâîëîâ èç ñòðîêè-àëôàâèòà
	private static int length = alphabet.length();
	
	private static Random r;
	private static Scanner scanner;
	
	// ñïèñîê list ÿâëÿåò ñîáîé ìàòðèöó
	private static ArrayList <ArrayList<Character>> list;
	
	// ìåòîä - íàïîëíÿåì ìàòðèöó
	public static void fill (ArrayList <ArrayList<Character>> list) {
		for (int i=0; i<m; i++) {
			list.add(new ArrayList<Character>());
			for (int j=0; j<n; j++) {
				list.get(i).add(j, alphabet.charAt(r.nextInt(length)));
			}			
		}
	}
	
	// ìåòîä - âûâîä ìàòðèöû
	public static void showMatrix(ArrayList <ArrayList<Character>> list) {
		for (ArrayList<Character> e : list) {			
			System.out.print(e + "\n");			
		}
	}
	
	// ìåòîä - äîáàâëåíèå ñòðîêè (ñäâèã âíèç)
	public static void insertLine(ArrayList <ArrayList<Character>> list) {
		list.add(0, new ArrayList<Character>());
	}
	
	// ìåòîä - óäàëåíèå ñòðîêè (ñäâèã ââåðõ)
	public static void deleteLine(ArrayList <ArrayList<Character>> list) {
		list.remove(0);
	}
		
	// ìåòîä - äîáàâëåíèå ñòîëáöà (ñäâèã âïðàâî)
	public static void insertColumn(ArrayList <ArrayList<Character>> list) {
		for (ArrayList<Character> element : list) {
			element.add(0, ' ');
		}
	}
	
	// ìåòîä - óäàëåíèå ñòîëáöà (ñäâèã âëåâî)
	public static void deleteColumn(ArrayList <ArrayList<Character>> list) {
		for (ArrayList<Character> element : list) {
			element.remove(0);
		}
	}
	
	
	public static void main(String[] args) {
		
		m = 4;	// ñòðîê
		n = 7;	// ñòîëáöîâ		
		r = new Random();	
		
		list = new ArrayList();
		
		// íàïîëíÿåì ìàòðèöó
		fill(list);
		
		// âûâîäèì ìàòðèöó
		System.out.println("Ìàòðèöà:");
		showMatrix(list);
		System.out.println();
				
		// ñ÷èòûâàåì íàïðàâëåíèå äîáàâëÿåìîé ñòðîêè
		while (! correctDirection) {
			System.out.println("Êóäà ñäâèãàòü?"
					+ "\n 1. Ââåðõ (óäàëèòü ñòðîêè)."
					+ "\n 2. Âíèç (äîáàâèòü ñòðîêè)."
					+ "\n 3. Âëåâî (óäàëèòü ñòîëáöû)."
					+ "\n 4. Âïðàâî (äîáàâèòü ñòîëáöû).");
			scanner = new Scanner(System.in);
			try {
				direction = scanner.nextInt();
				if (direction == 1 || direction == 2 ||
					direction == 3 || direction == 4) {
					correctDirection = true;
				} else {
					System.out.println("Ââåäèòå îò 1 äî 4"); 	
				}
			} catch (InputMismatchException e) {
				System.out.println("Ââåäèòå ÷èñëî!");
			}
		}
		
		// îãðàíè÷åíèÿ êîëè÷åñòâà ñäâèãîâ
		while (! correctQuantity) {
			System.out.println("Ñêîëüêî ðàç?");
			scanner = new Scanner(System.in);
			try {
				quantity = scanner.nextInt();
				if (quantity > 0) {
					// îãðàíè÷èòü ñäâèã ââåðõ êîëè÷åñòâîì ñòðîê
					if (direction == 1) {
						if ( quantity <= list.size()) {
							correctQuantity = true;
						} else {
						System.out.println("Ââåäèòå îò 1 äî " + list.size());
						continue;
							}
					}	
					// îãðàíè÷èòü ñäâèã âëåâî êîëè÷åñòâîì ñòîëáöîâ
					if (direction == 3) {
						if (quantity <= list.get(0).size()) {
							correctQuantity = true;
						} else {
							System.out.println("Ââåäèòå îò 1 äî " + list.get(0).size());
							continue;
							}	
					}	
					correctQuantity = true;
				}					
			} catch (InputMismatchException e) {
				System.out.println("Ââåäèòå íàòóðàëüíîå ÷èñëî!");
			}
		}
		
		// îáðàáîòêà ìàòðèöû â çàâèñèìîñòè îò âûáðàííîãî íàïðàâëåíèÿ
		switch (direction) {				
			// ñäâèã ââåðõ
			case 1: {
				for (int i=0; i<quantity; i++) {
					System.out.println("Ñäâèã ââåðõ - " + (i+1));
					deleteLine(list);
					showMatrix(list);
					System.out.println();
				}
				break;
			}				
			// ñäâèã âíèç
			case 2: {
				for (int i=0; i<quantity; i++) {
					System.out.println("Ñäâèã âíèç - " + (i+1));
					insertLine(list);
					showMatrix(list);
					System.out.println();
				}
				break;
			}			
			// ñäâèã âëåâî 
			case 3: {
				for (int i=0; i<quantity; i++) {
					System.out.println("Ñäâèã âëåâî - " + (i+1));
					deleteColumn(list);
					showMatrix(list);
					System.out.println();
				}
				break;
			}			
			// ñäâèã âïðàâî 
			case 4: {
				for (int i=0; i<quantity; i++) {
					System.out.println("Ñäâèã âïðàâî - " + (i+1));
					insertColumn(list);
					showMatrix(list);
					System.out.println();
				}
				break;
			}			
			default : {
				break;
			}					
		}
		
	}

}