Create Spiral-Matrix.java

Added the java code for Spiral Matrix.

Author: anurag-sharma17

src/main/java/com/thealgorithms/misc/Spiral-Matrix.java

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+public class SpiralPattern {
+    
+    public static void generateSpiralPattern(int n) {
+        // Initialize an empty matrix
+        int[][] spiralMatrix = new int[n][n];
+        
+        // Define directions for right, down, left, and up movements
+        int[][] directions = { {0, 1}, {1, 0}, {0, -1}, {-1, 0} };
+        int currentDirection = 0;
+        
+        int row = 0, col = 0;  // Start from the top-left corner
+        for (int num = 1; num <= n * n; num++) {
+            // Assign the current number to the matrix
+            spiralMatrix[row][col] = num;
+            
+            // Calculate the next position
+            int nextRow = row + directions[currentDirection][0];
+            int nextCol = col + directions[currentDirection][1];
+            
+            // Check if we need to change direction
+            if (nextRow < 0 || nextRow >= n || nextCol < 0 || nextCol >= n || spiralMatrix[nextRow][nextCol] != 0) {
+                // Change direction
+                currentDirection = (currentDirection + 1) % 4;
+                nextRow = row + directions[currentDirection][0];
+                nextCol = col + directions[currentDirection][1];
+            }
+            
+            // Move to the next cell
+            row = nextRow;
+            col = nextCol;
+        }
+        
+        // Print the spiral pattern
+        for (int[] rows : spiralMatrix) {
+            for (int num : rows) {
+                System.out.printf("%02d ", num);  // Format numbers as 2 digits
+            }
+            System.out.println();
+        }
+    }
+    
+    public static void main(String[] args) {
+        int n = 5;  // Set the size of the spiral matrix
+        generateSpiralPattern(n);
+    }
+}