48. Rotate Image (java)

Author: bluesword12350

solution/0048.Rotate Image/Solution.java

@@ -0,0 +1,20 @@
+class Solution {
+    public void rotate(int[][] matrix) {
+        if(matrix==null) return;
+        int n=matrix.length;
+        for(int i=0;i<n;i++){
+            for(int j=i;j<n;j++){
+                int temp=matrix[i][j];
+                matrix[i][j]=matrix[j][i];
+                matrix[j][i]=temp;
+            }
+        }
+        for(int i=0;i<n;i++){
+            for(int j=0;j<n/2;j++){
+                int temp = matrix[i][j];
+                matrix[i][j] = matrix[i][matrix.length-1-j];
+                matrix[i][matrix.length-1-j] = temp;
+            }
+        }
+    }
+}