Boundary Elements of Matrix
This program prints boundary elements of a matrix.
Problem Statement
Write a Java program to print boundary elements of a 4x4 matrix.
Source Code
| 1 | public class MatrixBoundaryElements { |
| 2 | public static void main(String[] args) { |
| 3 | System.out.println("Eduinq Matrix Boundary Elements"); |
| 4 | int[][] A = { |
| 5 | {1,2,3,4}, |
| 6 | {5,6,7,8}, |
| 7 | {9,10,11,12}, |
| 8 | {13,14,15,16} |
| 9 | }; |
| 10 | for(int i=0;i<4;i++){ |
| 11 | for(int j=0;j<4;j++){ |
| 12 | if(i==0||i==3||j==0||j==3) |
| 13 | System.out.print(A[i][j]+" "); |
| 14 | else System.out.print(" "); |
| 15 | } |
| 16 | System.out.println(); |
| 17 | } |
| 18 | } |
| 19 | } |
Program Output
Eduinq Matrix Boundary Elements 1 2 3 4 5 8 9 12 13 14 15 16
Explanation
Boundary elements are those in the first/last row or first/last column, so the condition checks i==0, i==n-1, j==0, j==n-1 and prints spaces elsewhere, demonstrating how multidimensional arrays can isolate boundary values.