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class Solution { public void rotate(int[][] matrix) { //上下交换 for(int i = 0 ; i<matrix.length/2;i++){ int[] temp = matrix[i]; matrix[i] = matrix[matrix.length-i-1]; matrix[matrix.length-i-1] =temp; } //对角交换 for(int i = 0 ; i<matrix.length;i++){ for(int j = i+1 ; j<matrix.length;j++){ int temp = matrix[i][j]; matrix[i][j] = matrix[j][i]; matrix[j][i] = temp; } } } }
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