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RotateImage.java
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RotateImage.java
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package leetcode;
public class RotateImage {
public static void rotate(int[][] matrix) {
int n = matrix.length;
int[][] result = new int[n][n];
for(int i = 0;i<n;i++){
for(int j = 0;j<n;j++){
result[j][n-i-1] = matrix[i][j];
}
}
for(int i = 0;i<n;i++){
for(int j = 0;j<n;j++){
matrix[i][j] = result[i][j];
}
}
}
public static void rotate2(int[][] matrix) {
int n = matrix.length;
int temp ;
for(int j = 0;j<n/2;j++){
for(int i = j;i<n-1-j;i++){
temp = matrix[n-i-1][j];
matrix[n-i-1][j] = matrix[n-1-j][n-1-i];
matrix[n-1-j][n-1-i] = matrix[i][n-1-j];
matrix[i][n-1-j] = matrix[j][i];
matrix[j][i] = temp;
System.out.println("i is " +i+" j is "+j);
for(int ii = 0;ii<n;ii++){
for(int jj = 0;jj<n;jj++){
System.out.print(matrix[ii][jj]+" ");
}
System.out.println();
}
}
}
}
public static void main(String[] args){
int n =6;
int[][] matrix = new int[n][n];
int temp = 1;
for(int i = 0;i<n;i++){
for(int j = 0;j<n;j++){
matrix[i][j] = temp;
temp++;
}
}
rotate2(matrix);
System.out.println(n);
for(int i = 0;i<n;i++){
for(int j = 0;j<n;j++){
System.out.print(matrix[i][j]+" ");
}
System.out.println();
}
}
}