import java.util.Arrays;
public class SpiralMatrixGenerator {
public static int[][] generateSpiralMatrix(int n) {
int[][] matrix = new int[n][n];
int top = 0, bottom = n - 1;
int left = 0, right = n - 1;
int num = 1;
while (top <= bottom && left <= right) {
// Fill top row
for (int i = left; i <= right; ++i) {
matrix[top][i] = num++;
}
top++;
// Fill right column
for (int i = top; i <= bottom; ++i) {
matrix[i][right] = num++;
}
right--;
// Fill bottom row
if (top <= bottom) {
for (int i = right; i >= left; --i) {
matrix[bottom][i] = num++;
}
bottom--;
}
// Fill left column
if (left <= right) {
for (int i = bottom; i >= top; --i) {
matrix[i][left] = num++;
}
left++;
}
}
return matrix;
}
public static void main(String[] args) {
int n = 3; // size of the matrix
int[][] spiralMatrix = generateSpiralMatrix(n);
// Print the matrix
for (int[] row : spiralMatrix) {
for (int val : row) {
System.out.print(val + "\t");
}
System.out.println();
}
}
}
/*
run:
1 2 3
8 9 4
7 6 5
*/
