Given N*M matrix, rotate it by 90
degree right
package core.geeks;
class Rotate90Degree {
private static void rotateMatrix(int[][] array) {
int oRow = array.length;
int oCol = array[0].length;
int[][] tArr = new int[oCol][oRow];
int tCol = 3;
for (int i = 0; i <
oRow; i++){
for(int j = 0; j < oCol; j++){
tArr[j][tCol] = array[i][j];
}
tCol--;
}
printGrid(tArr);
}
public static void main(String
args[] ) throws Exception {
int[][] array =
{ {0, 1, 2, 3, 4},
{5, 6, 7, 8, 9},
{10, 11, 12, 13, 14},
{15, 16, 17, 18, 19}};
rotateMatrix(array);
}
public static void printGrid(int[][] a) {
for(int i = 0;
i < a.length; i++) {
for(int j = 0;
j < a[i].length; j++) {
System.out.printf("%5d ", a[i][j]);
}
System.out.println();
}
}
}
Output:
15 10 5 0
16 11 6 1
17 12 7 2
18 13 8 3
19 14 9 4
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