Created MatrixRotation.java

Java/MatrixRotation.java

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+// Java Program to Rotate Matrix Elements
+
+// Importing classes from java.lang package
+import java.lang.*;
+// Importing classes from java.util package
+import java.util.*;
+
+class RotateMatrix {
+	static int r = 4;
+	static int c = 4;
+
+	// Method
+
+	static void rotate_matrix(int p, int q, int matrix[][])
+	{
+		int rw = 0, cl = 0;
+		int previous, current;
+
+		while (rw < p && cl < q) {
+
+			if (rw + 1 == p || cl + 1 == q)
+				break;
+
+			previous = matrix[rw + 1][cl];
+
+			for (int x = cl; x < q; x++) {
+				current = matrix[rw][x];
+				matrix[rw][x] = previous;
+				previous = current;
+			}
+			rw++;
+
+			for (int x = rw; x < p; x++) {
+				current = matrix[x][q - 1];
+				matrix[x][q - 1] = previous;
+				previous = current;
+			}
+			q--;
+
+			if (rw < p) {
+				for (int x = q - 1; x >= cl; x--) {
+					current = matrix[p - 1][x];
+					matrix[p - 1][x] = previous;
+					previous = current;
+				}
+			}
+			p--;
+
+			if (cl < q) {
+				for (int x = p - 1; x >= rw; x--) {
+					current = matrix[x][cl];
+					matrix[x][cl] = previous;
+					previous = current;
+				}
+			}
+			cl++;
+		}
+		for (int x = 0; x < r; x++) {
+			for (int y = 0; y < c; y++)
+				System.out.print(matrix[x][y] + " ");
+			System.out.print("\n");
+		}
+	}
+	//Method 2
+	// Main driver method
+	public static void main(String[] args)
+	{
+		int b[][] = { { 5, 6, 7, 8 },
+					{ 1, 2, 3, 4 },
+					{ 0, 15, 6, 5 },
+					{ 3, 1, 2, 12 } };
+
+		rotate_matrix(r, c, b);
+	}
+}