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Ans. public class Matrix { public static void main(String[] args) { int[][] matrix = { {1, 2, 3}, {4, 5, 6}, {7, 8, 9} }; Matrix.rotateMatrix(matrix); for (int i = 0; i < matrix.length; i ){ for (int j = 0; j < matrix.length; j ){ System.out.print(matrix[i][j] " "); } System.out.println(); } } public static void rotateMatrix(int[][] matrix){ int row = matrix.length; //first find the transpose of the matrix. for (int i = 0; i < row; i ){ for (int j = i; j < row; j ){ int temp = matrix[i][j]; matrix[i][j] = matrix[j][i]; matrix[j][i] = temp; } } //reverse each row for (int i = 0; i< row; i ){ for(int j = 0; j< row/2; j ){ int temp = matrix[i][j]; matrix[i][j] = matrix[i][row - 1 - j]; matrix[i][row - 1 - j] = temp; } } } } | ||||
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