src/hw1/MatrixRotation.java - master - Elyumusa/SberJavaCourseBeginner

src/hw1/MatrixRotation.java
82 строки2 KB
Elyumusa
Обновлено задание 3
26 мар 2025, 12:39
26 мар 2025, 12:39338f6d8
package hw1;

import java.util.Random;

public class MatrixRotation {
    static Random random = new Random();
    public static void main(String[] args) {
        int rows=8;
        int cols=8;
        int[][] myNumbers = generateMatrix(rows, cols);
        System.out.println("Original matrix:");
        printMatrix(myNumbers);

        rotateClockwise(myNumbers);
        System.out.println("Rotated matrix (clockwise):");
        printMatrix(myNumbers);

    }

    private static void rotateClockwise(int[][] matrix) {
        transpose(matrix);
        reverseRows(matrix);
    }



    private static void transpose(int[][] matrix){
        for(int i=0;i<matrix.length;i++){
            for(int j=i;j<matrix[i].length;j++){
                int temp=matrix[i][j];
                matrix[i][j]=matrix[j][i];
                matrix[j][i]=temp;  }
        }
    }

    private static void reverseRows(int[][] matrix){
        for(int[] row:matrix){
            for(int i=0, j=row.length-1;i<j;i++,j--){
                int temp=row[i];
                row[i]=row[j];
                row[j]=temp;
            }
        }
    }

    private static void reverseColumns(int[][] matrix){
        for(int i=0, j=matrix.length-1;i<j;i++,j--){
            for(int col=0;col<matrix[i].length;col++){
                int temp=matrix[i][col];
                matrix[i][col]=matrix[j][col];
                matrix[j][col]=temp;
            }
        }
    }

    private static void rotateMatrix(int[][] myNumbers, int[][] rotated) {
        for (int i = 0; i < myNumbers.length; i++) {
            for (int j = 0; j < myNumbers[i].length; j++) {
                rotated[j][myNumbers[i].length - i - 1] = myNumbers[i][j];
            }
        }
    }

    private static void printMatrix(int[][] myNumbers) {
        for (int[] row : myNumbers) {
            for (int number : row) {
                System.out.print(number + " ");
            }
            System.out.println();
        }
    }

    private static int[][] generateMatrix(int rows, int cols) {
        int[][] matrix = new int[rows][cols];
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                matrix[i][j] = random.nextInt(256);

            }
        }
        return matrix;
    }}