// 二维数组逆序
	public static void outOf() {
		int[][] old = { { 31, 32, 48, 37 }, { 41, 30, 97, 73 }, { 13, 34, 92, 37 } };
		int[][] newa = new int[3][4];
		for (int i = old.length - 1; i >= 0; i--) {
			for (int j = old[i].length -1; j >= 0; j--) {
				newa[old.length - 1 - i][old[i].length - 1 - j] = old[i][j];
			}
		}
		
		for (int[] row : old) {
			for (int val : row) {
				System.out.print(val + " ");
			}
			System.out.println();
		}
		System.out.println("-----------------");
		for (int[] row : newa) {
			for (int val : row) {
				System.out.print(val + " ");
			}
			System.out.println();
		}
	}