w3resource
Java Programming Exercies

Java Method Exercises: Displays an n-by-n matrix

Java Method : Exercise-12 with Solution

Write a Java method (takes a number n as input) to displays an n-by-n matrix.

Sample Solution:

Java Code:

import java.util.Scanner;

public class Exercise12 {
 
public static void main(String[] args)
    {
        
        Scanner in = new Scanner(System.in);
        System.out.print("Input a number: ");
        int n = in.nextInt();
        printMatrix(n);
    }
 
 public static void printMatrix(int n) {

        for(int i = 0; i < n; i++) {
            for(int j = 0; j < n; j++) {
                System.out.print((int)(Math.random() * 2) + " ");
            }
            System.out.println();
        }
    }
}

Sample Output:

Input a number: 10                                                                                            
1 0 0 1 1 0 0 0 1 1                                                                                           
0 0 1 0 1 0 1 0 0 0                                                                                           
0 1 0 1 0 0 0 0 0 1                                                                                           
1 1 1 0 0 0 0 1 1 1                                                                                           
1 1 0 1 1 1 0 1 0 0                                                                                           
1 0 0 0 1 1 0 0 0 0                                                                                           
0 0 1 0 0 0 0 1 1 1                                                                                           
1 1 0 1 0 1 0 0 1 0                                                                                           
0 0 1 0 0 0 0 1 1 0                                                                                           
1 1 1 0 0 1 1 1 1 0

Flowchart:

Flowchart: Displays an n-by-n matrix

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a Java method to check whether a string is a valid password.
Next: Write Java methods to calculate the area of a triangle.

What is the difficulty level of this exercise?



New Content: Composer: Dependency manager for PHP, R Programming