Question

How to fill a matrix with 1 and 0 in random locations with Java

Answer 1

import java.util.Random;

public class Main {
    static final int ROWS = 5;
    static final int COLS = 4;

    public static void main(String[] args) {
        int[][] matrix = new int[ROWS][COLS];
        
        fillMatrixWithRandom0and1(matrix, ROWS, COLS);
        
        printMatrix(matrix, ROWS, COLS);
    }

    static void fillMatrixWithRandom0and1(int[][] matrix, int rows, int cols) {
        Random rand = new Random();

        // Fill the matrix with random 0s and 1s
        for (int i = 0; i < rows; ++i) {
            for (int j = 0; j < cols; ++j) {
                matrix[i][j] = rand.nextInt(2); // Generates either 0 or 1
            }
        }
    }

    static void printMatrix(int[][] matrix, int rows, int cols) {
        for (int i = 0; i < rows; ++i) {
            for (int j = 0; j < cols; ++j) {
                System.out.print(matrix[i][j] + " ");
            }
            System.out.println();
        }
    }
}


/*
run:

1 0 0 1 
0 0 1 0 
1 1 1 1 
0 0 1 1 
0 0 1 1 

*/

 

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