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Rotationof2Dmatrix.java
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Rotationof2Dmatrix.java
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import java.util.Arrays;
public class Rotationof2Dmatrix {
public static void Rotation(int arr[][]){
// Step 1:transpose the 2D array
int m=arr.length;
int n=arr[0].length;
for(int i=0;i<m;i++){
for(int j=i;j<n;j++){
int temp=arr[i][j];
arr[i][j]=arr[j][i];
arr[j][i]=temp;
}
}
// Step 2: Swap right and left index
for(int i=0;i<m;i++){
int left_index=0;
int right_index=n-1;
while (left_index<right_index) {
int temp=arr[i][left_index];
arr[i][left_index]=arr[i][right_index];
arr[i][right_index]=temp;
left_index++;
right_index--;
}
}
}
public static void main(String[] args) {
int arr[][]={
{1,2,3,4},
{5,6,7,8},
{9,10,11,12},
{13,14,15,16}
};
Rotation(arr);
for(var matrix:arr){
System.out.println(Arrays.toString(matrix));
}
}
}